Murder is the unlawful killing of another human without justification or valid excuse, especially the unlawful killing of another human with malice aforethought. 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.
In the common law of torts, res ipsa loquitur is a doctrine that infers negligence from the very nature of an accident or injury in the absence of direct evidence on how any defendant behaved. Although modern formulations differ by jurisdiction, common law originally stated that the accident must satisfy the necessary elements of negligence: duty, breach of duty, causation, and injury. In res ipsa loquitur, the elements of duty of care, breach, and causation are inferred from an injury that does not ordinarily occur without negligence.
The burden of proof is the obligation of a party in a trial to produce the evidence that will prove the claims they have made against the other party. In a legal dispute, one party is initially presumed to be correct and gets the benefit of the doubt, while the other side bears the burden of proof. When a party bearing the burden of proof meets its burden, the burden of proof switches to the other side. Burdens may be of different kinds for each party, in different phases of litigation. The burden of production is a minimal burden to produce at least enough evidence for the trier of fact to consider a disputed claim. After litigants have met the burden of production and their claim is being considered by a trier of fact, they have the burden of persuasion, that enough evidence has been presented to persuade the trier of fact that their side is correct. There are different standards of persuasiveness ranging from a preponderance of the evidence, where there is just enough evidence to tip the balance, to proof beyond a reasonable doubt, as in United States criminal courts.
In criminal law, diminished responsibility is a potential defense by excuse by which defendants argue that although they broke the law, they should not be held fully criminally liable for doing so, as their mental functions were "diminished" or impaired.
Spoliation of evidence is the intentional, reckless, or negligent withholding, hiding, altering, fabricating, or destroying of evidence relevant to a legal proceeding. Spoliation has three possible consequences: in jurisdictions where the (intentional) act is criminal by statute, it may result in fines and incarceration for the parties who engaged in the spoliation; in jurisdictions where relevant case law precedent has been established, proceedings possibly altered by spoliation may be interpreted under a spoliation inference, or by other corrective measures, depending on the jurisdiction; in some jurisdictions the act of spoliation can itself be an actionable tort.
Circumstantial evidence is evidence that relies on an inference to connect it to a conclusion of fact—such as a fingerprint at the scene of a crime. By contrast, direct evidence supports the truth of an assertion directly—i.e., without need for any additional evidence or inference.
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.
The People of the State of California v. Robert Page Anderson, 493 P.2d 880, 6 Cal. 3d 628, was a landmark case in the state of California that outlawed the use of capital punishment. It was subsequently overruled by a state constitutional amendment, called Proposition 17.
Fair comment is a legal term for a common law defense in defamation cases. It is referred to as honest comment in some countries.
In criminal law, intent is a subjective state of mind that must accompany the acts of certain crimes to constitute a violation. A more formal, generally synonymous legal term is scienter: intent or knowledge of wrongdoing.
In English criminal law, intention is one of the types of mens rea that, when accompanied by an actus reus, constitutes a crime.
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.
James Calvin Tillman is a man who was wrongfully convicted of rape, and served 18.5 years in prison before being exonerated by DNA testing on July 11, 2006. Tillman, of East Hartford Connecticut, was convicted of kidnapping in the first degree, sexual assault in the first degree, robbery and assault in the third degree in 1989, and freed in 2007.
Baylis v. Travelers' Insurance Company, 113 U.S. 316 (1885), was a case where after close of testimony in a trial, the defendant moved to dismiss on the ground of the insufficiency of the evidence to sustain a verdict. This motion was denied and the plaintiff asked that the case be submitted to the jury to determine the facts on the evidence. The court refused this, and plaintiff excepted. The court then ordered a verdict for plaintiff, subject to its opinion, whether the facts proved were sufficient to render defendant liable to plaintiff on the cause of action stated. Plaintiff moved for judgment on the verdict, and defendant moved for judgment on the pleadings and minutes of trial. Judgment was rendered for defendant upon an opinion of the court as to the effect of the evidence and as to the law on the facts as deduced from it by the court. Held that the plaintiff was thereby deprived of his constitutional right to a trial by jury, which he had not waived, and to which he was entitled.
Lowenfield v. Phelps, 484 U.S. 231 (1988) is a United States Supreme Court case in which the Court held that the two jury polls and the supplemental charge did not impermissibly coerce the jury to return a death sentence, and that the death sentence does not violate the Eighth Amendment simply because the single statutory "aggravating circumstance" found by the jury duplicates an element of the underlying offense of first-degree murder.
The Double Jeopardy Clause of the Fifth Amendment to the United States Constitution provides: "[N]or shall any person be subject for the same offence to be twice put in jeopardy of life or limb..." The four essential protections included are prohibitions against, for the same offense:
Griffin v. California, 380 U.S. 609 (1965), was a United States Supreme Court case in which the Court ruled, by a 6-2 vote, that it is a violation of a defendant's Fifth Amendment rights for the prosecutor to comment to the jury on the defendant's declining to testify, or for the judge to instruct the jury that such silence is evidence of guilt.
People v. Berry is a voluntary manslaughter case that is widely taught in American law schools for the appellate court's unusual interpretation of heat of passion doctrine. Although the defendant had time to "cool down" between his wife's verbal admission of infidelity and the killing, the California Supreme Court held that the provocation in this case was adequate to reduce a murder charge to manslaughter. The lower court had relied on the traditional definition of "adequate provocation" in its jury instructions. The California Supreme Court reversed Berry's murder conviction, while affirming Berry's conviction for assault using deadly force.
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.
