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The assassination of Agamemnon, an illustration from Stories from the Greek Tragedians by Alfred Church, 1897. The Murder Of Agamemnon - Project Gutenberg eText 14994.png
The assassination of Agamemnon, an illustration from Stories from the Greek Tragedians by Alfred Church, 1897.

Murder is the unlawful killing of another human without justification or valid excuse, especially the unlawful killing of another human with malice aforethought. [1] [2] [3] This state of mind may, depending upon the jurisdiction, distinguish murder from other forms of unlawful homicide, such as manslaughter. Manslaughter is a killing committed in the absence of malice, brought about by reasonable provocation, or diminished capacity. Involuntary manslaughter, where it is recognized, is a killing that lacks all but the most attenuated guilty intent, recklessness.

Human Hominin events for the last 10 million years

Humans are the only extant members of the subtribe Hominina. Together with chimpanzees, gorillas, and orangutans, they are part of the family Hominidae. A terrestrial animal, humans are characterized by their erect posture and bipedal locomotion; high manual dexterity and heavy tool use compared to other animals; open-ended and complex language use compared to other animal communications; larger, more complex brains than other animals; and highly advanced and organized societies.

Justification is a defense in a criminal case, by which a defendant who committed the crime as defined, claims they did no wrong, because committing the crime advanced some social interest or vindicated a right of such importance that it outweighs the wrongfulness of the crime. Justification and excuse are related but different defenses.

Malice aforethought is the "premeditation" or "predetermination" required as an element of some crimes in some jurisdictions and a unique element for first-degree or aggravated murder in a few. Insofar as the term is still in use, it has a technical meaning that has changed substantially over time.


Most societies consider murder to be an extremely serious crime, and thus believe that the person charged should receive harsh punishments for the purposes of retribution, deterrence, rehabilitation, or incapacitation. In most countries, a person convicted of murder generally faces a long-term prison sentence, possibly a life sentence; and in a few, the death penalty may be imposed. [4]

Retributive justice Theory of justice based on an offender deserving a proportional punishment

Retributive justice is a theory of punishment that when an offender breaks the law, justice requires that he or she suffer in return. It also requires that the response to a crime is proportional to the offence. Prevention of future crimes (deterrence) or rehabilitation of the offender are other purposes of punishment. Retribution is different from revenge because retributive justice is directed only at wrongs, has inherent limits, is not personal and involves no pleasure at the suffering of others and employs procedural standards. Classical texts advocating the retributive view include De Legibus, Kant's Science of Right (1790), and Hegel's Philosophyof Right (1821).

Rehabilitation (penology) process to make a person again a functional part of society

Rehabilitation is the process of re-educating and retraining those who commit crime. It generally involves psychological approaches which target the cognitive distortions associated with specific kinds of crime committed by particular offenders - but may also involve more general education such as literacy skills and work training. The goal is to re-integrate offenders back into society.

Crime prevention is the attempt to reduce and deter crime and criminals. It is applied specifically to efforts made by governments to reduce crime, enforce the law, and maintain criminal justice.


The modern English word "murder" descends from the Proto-Indo-European "mrtró" which meant "to die". [5] The Middle English mordre is a noun from Anglo-Saxon morðor and Old French murdre. Middle English mordre is a verb from Anglo-Saxon myrdrian and the Middle English noun. [6]

Middle English Stage of the English language from about the 12th through 15th centuries

Middle English was a form of the English language spoken after the Norman conquest (1066) until the late 15th century. English underwent distinct variations and developments following the Old English period. Scholarly opinion varies, but the Oxford English Dictionary specifies the period when Middle English was spoken as being from 1150 to 1500. This stage of the development of the English language roughly followed the High to the Late Middle Ages.

Old French was the language spoken in Northern France from the 8th century to the 14th century. In the 14th century, these dialects came to be collectively known as the langue d'oïl, contrasting with the langue d'oc or Occitan language in the south of France. The mid-14th century is taken as the transitional period to Middle French, the language of the French Renaissance, specifically based on the dialect of the Île-de-France region.

Use of the term

In many countries, in news reports, out of concern for being accused of defamation, [7] journalists are generally careful not to identify a suspect as a murderer until the suspect is convicted of homicide. After arrest, for example, journalists may instead write that the person was "arrested on suspicion of murder", [8] or, after a prosecutor files charges, as an "accused murderer". [9]


The eighteenth-century English jurist William Blackstone (citing Edward Coke), in his Commentaries on the Laws of England set out the common law definition of murder, which by this definition occurs

William Blackstone 18th-century English jurist, judge, and politician

Sir William Blackstone was an English jurist, judge and Tory politician of the eighteenth century. He is most noted for writing the Commentaries on the Laws of England. Born into a middle-class family in London, Blackstone was educated at Charterhouse School before matriculating at Pembroke College, Oxford in 1738.After switching to and completing a Bachelor of Civil Law degree, he was made a Fellow of All Souls, Oxford on 2 November 1743, admitted to Middle Temple, and called to the Bar there in 1746. Following a slow start to his career as a barrister, Blackstone became heavily involved in university administration, becoming accountant, treasurer and bursar on 28 November 1746 and Senior Bursar in 1750. Blackstone is considered responsible for completing the Codrington Library and Warton Building, and simplifying the complex accounting system used by the college. On 3 July 1753 he formally gave up his practice as a barrister and instead embarked on a series of lectures on English law, the first of their kind. These were massively successful, earning him a total of £453, and led to the publication of An Analysis of the Laws of England in 1756, which repeatedly sold out and was used to preface his later works.

Edward Coke English lawyer and judge

Sir Edward Coke was an English barrister, judge, and politician who is considered to be the greatest jurist of the Elizabethan and Jacobean eras.

<i>Commentaries on the Laws of England</i> Influential 18th-century treatise on the common law of England by Sir William Blackstone

The Commentaries on the Laws of England are an influential 18th-century treatise on the common law of England by Sir William Blackstone, originally published by the Clarendon Press at Oxford, 1765–1770. The work is divided into four volumes, on the rights of persons, the rights of things, of private wrongs and of public wrongs.

when a person, of sound memory and discretion, unlawfully kills any reasonable creature in being and under the king's peace, with malice aforethought, either express or implied. [10]

The elements of common law murder are:

  1. Unlawful
  2. killing
  3. through criminal act or omission
  4. of a human
  5. by another human
  6. with malice aforethought. [11]

The four states of mind recognized as constituting "malice" are: [15]

  1. Intent to kill,
  2. Intent to inflict grievous bodily harm short of death,
  3. Reckless indifference to an unjustifiably high risk to human life (sometimes described as an "abandoned and malignant heart"), or
  4. Intent to commit a dangerous felony (the "felony murder" doctrine).

Under state of mind (i), intent to kill, the deadly weapon rule applies. Thus, if the defendant intentionally uses a deadly weapon or instrument against the victim, such use authorizes a permissive inference of intent to kill. In other words, "intent follows the bullet". Examples of deadly weapons and instruments include but are not limited to guns, knives, deadly toxins or chemicals or gases and even vehicles when intentionally used to harm one or more victims.

Under state of mind (iii), an "abandoned and malignant heart", the killing must result from the defendant's conduct involving a reckless indifference to human life and a conscious disregard of an unreasonable risk of death or serious bodily injury. In Australian jurisdictions, the unreasonable risk must amount to a foreseen probability of death (or grievous bodily harm in most states), as opposed to possibility. [16]

Under state of mind (iv), the felony-murder doctrine, the felony committed must be an inherently dangerous felony, such as burglary, arson, rape, robbery or kidnapping. Importantly, the underlying felony cannot be a lesser included offense such as assault, otherwise all criminal homicides would be murder as all are felonies.

As with most legal terms, the precise definition of murder varies between jurisdictions and is usually codified in some form of legislation. Even when the legal distinction between murder and manslaughter is clear, it is not unknown for a jury to find a murder defendant guilty of the lesser offence. The jury might sympathise with the defendant (e.g. in a crime of passion, or in the case of a bullied victim who kills their tormentor), and the jury may wish to protect the defendant from a sentence of life imprisonment or execution.

Degrees of murder

Many jurisdictions divide murder by degrees. The distinction between first- and second-degree murder exists, for example, in Canadian murder law and U.S. murder law.

The most common division is between first- and second-degree murder. Generally, second-degree murder is common law murder, and first-degree is an aggravated form. The aggravating factors of first-degree murder depend on the jurisdiction, but may include a specific intent to kill, premeditation, or deliberation. In some, murder committed by acts such as strangulation, poisoning, or lying in wait are also treated as first-degree murder. [17] A few states in the U.S. further distinguish third-degree murder, but they differ significantly in which kinds of murders they classify as second-degree versus third-degree. For example, Minnesota defines third-degree murder as depraved-heart murder, whereas Florida defines third-degree murder as felony murder (except when the underlying felony is specifically listed in the definition of first-degree murder). [18] [19]

Some jurisdictions also distinguish premeditated murder. This is the crime of wrongfully and intentionally causing the death of another human being (also known as murder) after rationally considering the timing or method of doing so, in order to either increase the likelihood of success, or to evade detection or apprehension. [20] State laws in the United States vary as to definitions of "premeditation". In some states, premeditation may be construed as taking place mere seconds before the murder. Premeditated murder is one of the most serious forms of homicide, and is punished more severely than manslaughter or other types of homicide, often with a life sentence without the possibility of parole, or in some countries, the death penalty. In the U.S, federal law ( 18 U.S.C.   § 1111(a) ) criminalizes premeditated murder, felony murder and second-degree murder committed under situations where federal jurisdiction applies. [21] In Canada, the Criminal Code classifies murder as either 1st- or 2nd-degree. The former type of murder is often called premeditated murder, although premeditation is not the only way murder can be classified as first-degree.

Common law

According to Blackstone, English common law identified murder as a public wrong. [22] According to common law, murder is considered to be malum in se , that is an act which is evil within itself. An act such as murder is wrong or evil by its very nature. And it is the very nature of the act which does not require any specific detailing or definition in the law to consider murder a crime. [23]

Some jurisdictions still take a common law view of murder. In such jurisdictions, what is considered to be murder is defined by precedent case law or previous decisions of the courts of law. However, although the common law is by nature flexible and adaptable, in the interests both of certainty and of securing convictions, most common law jurisdictions have codified their criminal law and now have statutory definitions of murder.



Although laws vary by country, there are circumstances of exclusion that are common in many legal systems.

  • Killing of enemy combatants who have not surrendered by lawful combatants, in accordance with lawful orders in war, is also generally not considered murder; although illicit killings within a war may constitute murder or homicidal war crimes. (see the Laws of war article)
  • Self-defense: acting in self-defense or in defense of another person is generally accepted as legal justification for killing a person in situations that would otherwise have been murder. However, a self-defense killing might be considered manslaughter if the killer established control of the situation before the killing took place. In the case of self-defense it is called a "justifiable homicide". [24]
  • Unlawful killings without malice or intent are considered manslaughter.
  • In many common law countries, provocation is a partial defense to a charge of murder which acts by converting what would otherwise have been murder into manslaughter (this is voluntary manslaughter, which is more severe than involuntary manslaughter).
  • Accidental killings are considered homicides. Depending on the circumstances, these may or may not be considered criminal offenses; they are often considered manslaughter.
  • Suicide does not constitute murder in most societies. Assisting a suicide, however, may be considered murder in some circumstances.

Specific to certain countries

  • Capital punishment: some countries practice the death penalty. Capital punishment may be ordered by a legitimate court of law as the result of a conviction in a criminal trial with due process for a serious crime. The 47 Member States of the Council of Europe are prohibited from using the death penalty.
  • Euthanasia, doctor-assisted suicide: the administration of lethal drugs by a doctor to a terminally ill patient, if the intention is solely to alleviate pain, in many jurisdictions it is seen as a special case (see the doctrine of double effect and the case of Dr John Bodkin Adams). [25]
  • Killing to prevent the theft of one's property may be legal, depending on the jurisdiction. [26] [27] In 2013, a jury in south Texas acquitted a man who killed a prostitute who attempted to run away with his money. [28]
  • Killing an intruder who is found by an owner to be in the owner's home (having entered unlawfully): legal in most US states (see Castle doctrine). [29]
  • Killing to prevent specific forms of aggravated rape or sexual assault – killing of attacker by the potential victim or by witnesses to the scene; legal in parts of the US and in various other countries. [30]
  • In Pakistan, the killing of a woman or girl in specific circumstances (e.g., when she commits adultery and is killed by her husband or other family members, known as honor killing) is not considered murder. [31] [32]
  • In the United States, in some states and in federal jurisdiction, a killing by a police officer is excluded from prosecution if the officer believes they are being threatened with deadly force by the victim. This may include such actions by the victim as reaching into a glove compartment or pocket for license and registration, if the officer thinks that the victim might be reaching for a gun. [33]
  • Space jurisdiction is similar to that of international waters. Therefore, a murder committed in outer space is subject to jurisdiction in the country that owns the space craft in which the killing transpired. In the event the murder occurred on an extraterrestrial planet (e.g. the Moon), no country can own land of any other planet so the killer is bound by the laws of the country in which they originate. This also applies to the ISS per agreement signed by all countries that have worked on the station so all astronauts are covered by extraterratorial jurisdiction.


Murder in the House, Jakub Schikaneder. Jakub Schikaneder - Murder in the House.JPG
Murder in the House, Jakub Schikaneder.

All jurisdictions require that the victim be a natural person; that is, a human being who was still alive before being murdered. In other words, under the law one cannot murder a corpse, a corporation, a non-human animal, or any other non-human organism such as a plant or bacterium.

California's murder statute, Penal Code Section 187, was interpreted by the Supreme Court of California in 1994 as not requiring any proof of the viability of the fetus as a prerequisite to a murder conviction. [34] This holding has two implications. The first is a defendant in California can be convicted of murder for killing a fetus which the mother herself could have terminated without committing a crime. [34] The second, as stated by Justice Stanley Mosk in his dissent, is that because women carrying nonviable fetuses may not be visibly pregnant, it may be possible for a defendant to be convicted of intentionally murdering a person they did not know existed. [34]

Mitigating circumstances

Some countries allow conditions that "affect the balance of the mind" to be regarded as mitigating circumstances. This means that a person may be found guilty of "manslaughter" on the basis of "diminished responsibility" rather than being found guilty of murder, if it can be proved that the killer was suffering from a condition that affected their judgment at the time. Depression, post-traumatic stress disorder and medication side-effects are examples of conditions that may be taken into account when assessing responsibility.


Mental disorder may apply to a wide range of disorders including psychosis caused by schizophrenia and dementia, and excuse the person from the need to undergo the stress of a trial as to liability. Usually, sociopathy and other personality disorders are not legally considered insanity, because of the belief they are the result of free will in many societies. In some jurisdictions, following the pre-trial hearing to determine the extent of the disorder, the defence of "not guilty by reason of insanity" may be used to get a not guilty verdict. [35] This defence has two elements:

  1. That the defendant had a serious mental illness, disease, or defect.
  2. That the defendant's mental condition, at the time of the killing, rendered the perpetrator unable to determine right from wrong, or that what they were doing was wrong.
Aaron Alexis holding a shotgun during his rampage. CCTV 1 of Aaron Alexis in building 197.jpg
Aaron Alexis holding a shotgun during his rampage.

Under New York law, for example:

§ 40.15 Mental disease or defect. In any prosecution for an offense, it is an affirmative defence that when the defendant engaged in the proscribed conduct, he lacked criminal responsibility by reason of mental disease or defect. Such lack of criminal responsibility means that at the time of such conduct, as a result of mental disease or defect, he lacked substantial capacity to know or appreciate either: 1. The nature and consequences of such conduct; or 2. That such conduct was wrong.

N.Y. Penal Law, § 40.15 [36]

Under the French Penal Code:

Article 122-1

  • A person is not criminally liable who, when the act was committed, was suffering from a psychological or neuropsychological disorder which destroyed his discernment or his ability to control his actions.
  • A person who, at the time he acted, was suffering from a psychological or neuropsychological disorder which reduced his discernment or impeded his ability to control his actions, remains punishable; however, the court shall take this into account when it decides the penalty and determines its regime.

Those who successfully argue a defence based on a mental disorder are usually referred to mandatory clinical treatment until they are certified safe to be released back into the community, rather than prison. [37] A criminal defendant is often presented with the option of pleading "not guilty by reason of insanity". Thus, a finding of insanity results in a not-guilty verdict, although the defendant is placed in a state treatment facility where they could be kept for years or even decades. [38]

Postpartum depression

Postpartum depression (also known as post-natal depression) is recognized in some countries as a mitigating factor in cases of infanticide. According to Dr. Susan Friedman, "Two dozen nations have infanticide laws that decrease the penalty for mothers who kill their children of up to one year of age. The United States does not have such a law, but mentally ill mothers may plead not guilty by reason of insanity." [39] In the law of the Republic of Ireland, infanticide was made a separate crime from murder in 1949, applicable for the mother of a baby under one year old where "the balance of her mind was disturbed by reason of her not having fully recovered from the effect of giving birth to the child or by reason of the effect of lactation consequent upon the birth of the child". [40] Since independence, death sentences for murder in such cases had always been commuted; [41] the new act was intended "to eliminate all the terrible ritual of the black cap and the solemn words of the judge pronouncing sentence of death in those cases ... where it is clear to the Court and to everybody, except perhaps the unfortunate accused, that the sentence will never be carried out." [42] In Russia, murder of a newborn child by the mother has been separate crime since 1996. [43]


For a killing to be considered murder in nine out of fifty states in the US, there normally needs to be an element of intent. A defendant may argue that they took precautions not to kill, that the death could not have been anticipated, or was unavoidable. As a general rule, manslaughter [44] constitutes reckless killing, but manslaughter also includes criminally negligent (i.e. grossly negligent) homicide. [45] Unintentional killing that results from an involuntary action generally cannot constitute murder. [46] After examining the evidence, a judge or jury (depending on the jurisdiction) would determine whether the killing was intentional or unintentional.

Diminished capacity

In those jurisdictions using the Uniform Penal Code, such as California, diminished capacity may be a defence. For example, Dan White used this defence [47] to obtain a manslaughter conviction, instead of murder, in the assassination of Mayor George Moscone and Supervisor Harvey Milk. Afterward, California amended its penal code to provide "As a matter of public policy there shall be no defense of diminished capacity, diminished responsibility, or irresistible impulse in a criminal action...." [48]

Aggravating circumstances

Murder with specified aggravating circumstances is often punished more harshly. Depending on the jurisdiction, such circumstances may include:

In the United States [58] and Canada, [59] these murders are referred to as first-degree or aggravated murders. Murder, under English criminal law, always carries a mandatory life sentence, but is not classified into degrees. Penalties for murder committed under aggravating circumstances are often higher, under English law, than the 15-year minimum non-parole period that otherwise serves as a starting point for a murder committed by an adult.

Felony murder rule

A legal doctrine in some common law jurisdictions broadens the crime of murder: when an offender kills in the commission of a dangerous crime, (regardless of intent), he/she is guilty of murder. The felony murder rule is often justified by its supporters as a means of deterring dangerous felonies, [60] but the case of Ryan Holle [61] shows it can be used very widely.

Year-and-a-day rule

In some common law jurisdictions, a defendant accused of murder is not guilty if the victim survives for longer than one year and one day after the attack. [62] This reflects the likelihood that if the victim dies, other factors will have contributed to the cause of death, breaking the chain of causation; and also means that the responsible person does not have a charge of murder "hanging over their head indefinitely". [63] Subject to any statute of limitations, the accused could still be charged with an offence reflecting the seriousness of the initial assault.

With advances in modern medicine, most countries have abandoned a fixed time period and test causation on the facts of the case. This is known as "delayed death" and cases where this was applied or was attempted to be applied go back to at least 1966. [64]

In England and Wales, the "year-and-a-day rule" was abolished by the Law Reform (Year and a Day Rule) Act 1996. However, if death occurs three years or more after the original attack then prosecution can take place only with the Attorney-General's approval.

In the United States, many jurisdictions have abolished the rule as well. [65] [66] Abolition of the rule has been accomplished by enactment of statutory criminal codes, which had the effect of displacing the common-law definitions of crimes and corresponding defences. In 2001 the Supreme Court of the United States held that retroactive application of a state supreme court decision abolishing the year-and-a-day rule did not violate the Ex Post Facto Clause of Article I of the United States Constitution. [67]

The potential effect of fully abolishing the rule can be seen in the case of 74-year-old William Barnes, charged with the murder of a Philadelphia police officer Walter T. Barclay Jr., who he had shot nearly 41 years previously. Barnes had served 16 years in prison for attempting to murder Barkley, but when the policeman died on August 19, 2007, this was alleged to be from complications of the wounds suffered from the shooting – and Barnes was charged with his murder. He was acquitted on May 24, 2010. [68]

Murder and natural selection

Martin Daly and Margo Wilson of McMaster University have claimed that several aspects of homicides, including the genetic relations or proximity between murderers and their victims, (as in the Cinderella effect), can often be explained by the evolution theory or evolutionary psychology. [69]

Historical and religious attitudes

A group of Thugs strangling a traveller on a highway in the early 19th century. Thugs Strangling Traveller.jpg
A group of Thugs strangling a traveller on a highway in the early 19th century.

In the Abrahamic religions, the first ever murder was committed by Cain against his brother Abel out of jealousy. [70] In the past, certain types of homicide were lawful and justified. Georg Oesterdiekhoff wrote:

Evans-Pritchard says about the Nuer from Sudan: "Homicide is not forbidden, and Nuer do not think it wrong to kill a man in fair fight. On the contrary, a man who slays another in combat is admired for his courage and skill." (Evans-Pritchard 1956: 195) This statement is true for most African tribes, for pre-modern Europeans, for Indigenous Australians, and for Native Americans, according to ethnographic reports from all over the world. ... Homicides rise to incredible numbers among headhunter cultures such as the Papua. When a boy is born, the father has to kill a man. He needs a name for his child and can receive it only by a man, he himself has murdered. When a man wants to marry, he must kill a man. When a man dies, his family again has to kill a man. [71]

In many such societies the redress was not via a legal system, but by blood revenge, although there might also be a form of payment that could be made instead—such as the weregild which in early Germanic society could be paid to the victim's family in lieu of their right of revenge.

One of the oldest-known prohibitions against murder appears in the Sumerian Code of Ur-Nammu written sometime between 2100 and 2050 BC. The code states, "If a man commits a murder, that man must be killed."

In Judeo-Christian traditions, the prohibition against murder is one of the Ten Commandments given by God to Moses in (Exodus: 20v13) and (Deuteronomy 5v17). The Vulgate and subsequent early English translations of the Bible used the term secretly killeth his neighbour or smiteth his neighbour secretly rather than murder for the Latin clam percusserit proximum. [72] [73] Later editions such as Young's Literal Translation and the World English Bible have translated the Latin occides simply as murder [74] [75] rather than the alternatives of kill, assassinate, fall upon, or slay.

In Islam according to the Qur'an, one of the greatest sins is to kill a human being who has committed no fault. "For that cause We decreed for the Children of Israel that whosoever killeth a human being for other than manslaughter or corruption in the earth, it shall be as if he had killed all mankind, and whoso saveth the life of one, it shall be as if he had saved the life of all mankind."[Quran   5:32] "And those who cry not unto any other god along with Allah, nor take the life which Allah hath forbidden save in (course of) justice, nor commit adultery – and whoso doeth this shall pay the penalty."[Quran   25:68]

The term assassin derives from Hashshashin, [76] a militant Ismaili Shi'ite sect, active from the 8th to 14th centuries. This mystic secret society killed members of the Abbasid, Fatimid, Seljuq and Crusader elite for political and religious reasons. [77] The Thuggee cult that plagued India was devoted to Kali, the goddess of death and destruction. [78] [79] According to some estimates the Thuggees murdered 1 million people between 1740 and 1840. [80] The Aztecs believed that without regular offerings of blood the sun god Huitzilopochtli would withdraw his support for them and destroy the world as they knew it. [81] According to Ross Hassig, author of Aztec Warfare, "between 10,000 and 80,400 persons" were sacrificed in the 1487 re-consecration of the Great Pyramid of Tenochtitlan. [82] [83]

Southern slave codes did make willful killing of a slave illegal in most cases. [84] For example, the 1860 Mississippi case of Oliver v. State charged the defendant with murdering his own slave. [85] In 1811, the wealthy white planter Arthur Hodge was hanged for murdering several of his slaves on his plantation in the British West Indies. [86] [ self-published source ]

In Corsica, vendetta was a social code that required Corsicans to kill anyone who wronged their family honor. Between 1821 and 1852, no fewer than 4,300 murders were perpetrated in Corsica. [87]


International murder rate per 100,000 inhabitants, 2011
>20 Map of world by intentional homicide rate.svg
International murder rate per 100,000 inhabitants, 2011

The World Health Organization reported in October 2002 that a person is murdered every 60 seconds. [88] An estimated 520,000 people were murdered in 2000 around the globe. Another study estimated the worldwide murder rate at 456,300 in 2010 with a 35% increase since 1990. [89] Two-fifths of them were young people between the ages of 10 and 29 who were killed by other young people. [90] Because murder is the least likely crime to go unreported, statistics of murder are seen as a bellwether of overall crime rates. [91]

Murder rates vary greatly among countries and societies around the world. In the Western world, murder rates in most countries have declined significantly during the 20th century and are now between 1 and 4 cases per 100,000 people per year. Latin America and the Caribbean, the region with the highest murder rate in the world, [92] experienced more than 2.5 million murders between 2000 and 2017. [93]

UNODC : Per 100,000 population (2011) Homicide Rate.png
UNODC : Per 100,000 population (2011)

Murder rates by country

Murder rates in jurisdictions such as Japan, Singapore, Hong Kong, Iceland, Sweden, Switzerland, Italy, Spain and Germany are among the lowest in the world, around 0.3–1 cases per 100,000 people per year; the rate of the United States is among the highest of developed countries, around 4.5 in 2014, [94] with rates in larger cities sometimes over 40 per 100,000. [95] The top ten highest murder rates are in Honduras (91.6 per 100,000), El Salvador, Ivory Coast, Venezuela, Belize, Jamaica, U.S. Virgin Islands, Guatemala, Saint Kitts and Nevis and Zambia. (UNODC, 2011 – full table here ).

The following absolute murder counts per-country are not comparable because they are not adjusted by each country's total population. Nonetheless, they are included here for reference, with 2010 used as the base year (they may or may not include justifiable homicide, depending on the jurisdiction). There were 52,260 murders in Brazil, consecutively elevating the record set in 2009. [96] Over half a million people were shot to death in Brazil between 1979 and 2003. [97] 33,335 murder cases were registered across India, [98] about 19,000 murders committed in Russia, [99] approximately 17,000 murders in Colombia (the murder rate was 38 per 100,000 people, in 2008 murders went down to 15,000), [100] approximately 16,000 murders in South Africa, [101] approximately 15,000 murders in the United States, [102] approximately 26,000 murders in Mexico, [103] approximately 13,000 murders in Venezuela, [104] approximately 4,000 murders in El Salvador, [105] approximately 1,400 murders in Jamaica, [106] approximately 550 murders in Canada [107] and approximately 470 murders in Trinidad and Tobago. [106] Pakistan reported 12,580 murders. [108]

The scene of a murder in Rio de Janeiro. More than 800,000 people were murdered in Brazil between 1980 and 2004. Murder Rio.JPG
The scene of a murder in Rio de Janeiro. More than 800,000 people were murdered in Brazil between 1980 and 2004.

In the United States, 666,160 people were killed between 1960 and 1996. [110] Approximately 90% of murders in the US are committed by males. [111] Between 1976 and 2005, 23.5% of all murder victims and 64.8% of victims murdered by intimate partners were female. [112] For women in the US, homicide is the leading cause of death in the workplace. [113]

In the US, murder is the leading cause of death for African American males aged 15 to 34. Between 1976 and 2008, African Americans were victims of 329,825 homicides. [114] [115] In 2006, Federal Bureau of Investigation's Supplementary Homicide Report indicated that nearly half of the 14,990 murder victims that year were Black (7421). [116] In the year 2007, there were 3,221 black victims and 3,587 white victims of non-negligent homicides. While 2,905 of the black victims were killed by a black offender, 2,918 of the white victims were killed by white offenders. There were 566 white victims of black offenders and 245 black victims of white offenders. [117] The "white" category in the Uniform Crime Reports (UCR) includes non-black Hispanics. [118] In London in 2006, 75% of the victims of gun crime and 79% of the suspects were "from the African/Caribbean community". [119] Murder demographics are affected by the improvement of trauma care, which has resulted in reduced lethality of violent assaults – thus the murder rate may not necessarily indicate the overall level of social violence. [120]

Workplace homicide, which tripled during the 1980s, is the fastest growing category of murder in America. [113] [121]

Development of murder rates over time in different countries is often used by both supporters and opponents of capital punishment and gun control. Using properly filtered data, it is possible to make the case for or against either of these issues. For example, one could look at murder rates in the United States from 1950 to 2000, [122] and notice that those rates went up sharply shortly after a moratorium on death sentences was effectively imposed in the late 1960s. This fact has been used to argue that capital punishment serves as a deterrent and, as such, it is morally justified. Capital punishment opponents frequently counter that the United States has much higher murder rates than Canada and most European Union countries, although all those countries have abolished the death penalty. Overall, the global pattern is too complex, and on average, the influence of both these factors may not be significant and could be more social, economic, and cultural.

Despite the immense improvements in forensics in the past few decades, the fraction of murders solved has decreased in the United States, from 90% in 1960 to 61% in 2007. [123] Solved murder rates in major U.S. cities varied in 2007 from 36% in Boston, Massachusetts to 76% in San Jose, California. [124] Major factors affecting the arrest rate include witness cooperation [123] and the number of people assigned to investigate the case. [124]

History of murder rates

Intentional homicide rate per 100,000 inhabitants, 2009 Homicide-world.png
Intentional homicide rate per 100,000 inhabitants, 2009

According to scholar Pieter Spierenburg homicide rates per 100,000 in Europe have fallen over the centuries, from 35 per 100,000 in medieval times, to 20 in 1500 AD, 5 in 1700, to below two per 100,000 in 1900. [125]

In the United States, murder rates have been higher and have fluctuated. They fell below 2 per 100,000 by 1900, rose during the first half of the century, dropped in the years following World War II, and bottomed out at 4.0 in 1957 before rising again. [126] The rate stayed in 9 to 10 range most of the period from 1972 to 1994, before falling to 5 in present times. [125] The increase since 1957 would have been even greater if not for the significant improvements in medical techniques and emergency response times, which mean that more and more attempted homicide victims survive. According to one estimate, if the lethality levels of criminal assaults of 1964 still applied in 1993, the country would have seen the murder rate of around 26 per 100,000, almost triple the actually observed rate of 9.5 per 100,000. [120]

The historical homicide rate in Stockholm since 1400 AD. The murder rate was very high in the Middle Ages. The rate has declined greatly: from 45 / 100,000 to a low of 0.6 in the 1950s. The last decades have seen the homicide rate rise slowly. Historical homicide rate in Stockholm.svg
The historical homicide rate in Stockholm since 1400 AD. The murder rate was very high in the Middle Ages. The rate has declined greatly: from 45 / 100,000 to a low of 0.6 in the 1950s. The last decades have seen the homicide rate rise slowly.

A similar, but less pronounced pattern has been seen in major European countries as well. The murder rate in the United Kingdom fell to 1 per 100,000 by the beginning of the 20th century and as low as 0.62 per 100,000 in 1960, and was at 1.28 per 100,000 as of 2009. The murder rate in France (excluding Corsica) bottomed out after World War II at less than 0.4 per 100,000, quadrupling to 1.6 per 100,000 since then. [127]

The specific factors driving this dynamics in murder rates are complex and not universally agreed upon. Much of the raise in the U.S. murder rate during the first half of the 20th century is generally thought to be attributed to gang violence associated with Prohibition. Since most murders are committed by young males, the near simultaneous low in the murder rates of major developed countries circa 1960 can be attributed to low birth rates during the Great Depression and World War II. Causes of further moves are more controversial. Some of the more exotic factors claimed to affect murder rates include the availability of abortion [128] and the likelihood of chronic exposure to lead during childhood (due to the use of leaded paint in houses and tetraethyllead as a gasoline additive in internal combustion engines). [129]


The success rate of criminal investigations into murders (the clearance rate) tends to be relatively high for murder compared to other crimes, due to its seriousness. In the United States, the clearance rate was 62.6% in 2004.

See also

Murder laws by country

Related Research Articles

Homicide is the act of one human killing another. A homicide requires only a volitional act by another person that results in death, and thus a homicide may result from accidental, reckless, or negligent acts even if there is no intent to cause harm. Homicides can be divided into many overlapping legal categories, including murder, manslaughter, justifiable homicide, killing in war, euthanasia, and capital punishment, depending on the circumstances of the death. These different types of homicides are often treated very differently in human societies; some are considered crimes, while others are permitted or even ordered by the legal system.

In law, provocation is when a person is considered to have committed a criminal act partly because of a preceding set of events that might cause a reasonable person to lose self control. This makes them less morally culpable than if the act was premeditated (pre-planned) and done out of pure malice. It "affects the quality of the actor's state of mind as an indicator of moral blameworthiness".

The concept of justifiable homicide in criminal law is a defense to culpable homicide, and requires exculpatory evidence in the legal defense of justification. In most countries, a homicide is justified when there is sufficient evidence to prove beyond a reasonable doubt that it was reasonable for the subject to believe that there was an imminent and otherwise unavoidable danger of death or grave bodily harm to the innocent. A homicide in this instance is blameless and distinct from the less stringent criteria authorizing deadly force in stand your ground rulings.

Vehicular homicide is a crime that involves the death of a person other than the driver as a result of either criminally negligent or murderous operation of a motor vehicle.

The rule of felony murder is a legal doctrine in some common law jurisdictions that broadens the crime of murder: when an offender kills in the commission of a dangerous or enumerated crime, the offender, and also the offender's accomplices or co-conspirators, may be found guilty of murder.

Culpable homicide is a categorisation of certain offences in various jurisdictions within the Commonwealth of Nations which involves the illegal killing of a person either with or without an intention to kill depending upon how a particular jurisdiction has defined the offence. Unusually for those legal systems which have originated or been influenced during rule by the United Kingdom, the name of the offence associates with Scots law rather than English law.

Mandatory sentencing requires that offenders serve a predefined term for certain crimes, commonly serious and violent offenses. Judges are bound by law; these sentences are produced through the legislature, not the judicial system. They are instituted to expedite the sentencing process and limit the possibility of irregularity of outcomes due to judicial discretion. Mandatory sentences are typically given to people who are convicted of certain serious and/or violent crimes, and require a prison sentence. Mandatory sentencing laws vary across nations; they are more prevalent in common law jurisdictions because civil law jurisdictions usually prescribe minimum and maximum sentences for every type of crime in explicit laws.

Slayer rule common law rule

The slayer rule, in the common law of inheritance, stops a person inheriting property from a person he or she murders. In figuring inheritance of the decedent's estate, the slayer is treated as though he or she had died before the person he or she murdered, hence his or her share of the estate would pass to his or her issue.

Murder is an offence under the common law of England and Wales. It is considered the most serious form of homicide, in which one person kills another with the intention to cause either death or serious injury unlawfully. The element of intentionality was originally termed malice aforethought although it required neither malice nor premeditation.

Crime in the United States has been recorded since colonization. Crime rates have varied over time, with a sharp rise after 1963, reaching a broad peak between the 1970s and early 1990s. Since then, crime has declined significantly in the United States, and current crime rates are approximately the same as those of the 1960s.

Manslaughter is a common law legal term for homicide considered by law as less culpable than murder. The distinction between murder and manslaughter is sometimes said to have first been made by the ancient Athenian lawmaker Draco in the 7th century BC.

Internet homicide refers to killing in which victim and perpetrator met online, in some cases having known each other previously only through the Internet. Also Internet killer is an appellation found in media reports for a person who broadcasts the crime of murder online or who murders a victim met through the Internet. The first known murder of a victim met online was in 1996. Depending on the venue used, other terms used in the media are Internet chat room killer, Craigslist killer, Facebook serial killer. Internet homicide can also be part of an Internet suicide pact or consensual homicide. Some commentators believe that reports on these homicides have overemphasized their connection to the Internet.

In the United States, the law regarding murder varies by jurisdiction. In most U.S. jurisdictions there is a hierarchy of acts, known collectively as homicide, of which first degree murder and felony murder are the most serious, followed by second degree murder, followed by voluntary manslaughter and involuntary manslaughter which are not as serious, and ending finally in justifiable homicide, which is not a crime. However, because there are at least 52 relevant jurisdictions, each with its own criminal code, this is a considerable simplification.

Responsibility for criminal law and criminal justice in the United States is shared between the states and the federal government.

English law contains homicide offences – those acts involving the death of another person. For a crime to be considered homicide, it must take place after the victim's legally recognised birth, and before their legal death. There is also the usually uncontroversial requirement that the victim be under the "Queen's peace". The death must be causally linked to the actions of the defendant. Since the abolition of the year and a day rule, there is no maximum time period between any act being committed and the victim's death, so long as the former caused the latter.

Manslaughter is a crime in the United States. Definitions can vary among jurisdictions, but manslaughter is invariably the act of causing the death of another person in a manner less culpable than murder.

Capital punishment is a legal penalty in the U.S. state of Pennsylvania.

Mikhail Popkov Russian serial killer and rapist

Mikhail Viktorovich Popkov is a Russian serial killer and rapist who sexually assaulted and murdered dozens of women between 1992 and 2010 in Angarsk, Irkutsk, and Vladivostok in Siberia. Known as "The Werewolf" and the "Angarsk maniac"—termed as one of Russia's most prolific serial killers—for the brutal nature of his crimes, Popkov was convicted of 22 murders in 2015, and confessed to 59 additional homicides three years later. On December 10, 2018 he was convicted for 56 of the 59 additional homicides. For three killings, the police could not find proof. Popkov received a second life sentence.


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