A chalk outline is a temporary outline, usually of a person, drawn on the ground, usually outlining evidence at a crime scene. The outline provides context for photographs of the crime scene, and assists investigators in preserving the evidence. Modern investigators almost never use chalk or tape as outlines at a crime scene to avoid contaminating the evidence. Although rare in modern investigations, they have become a literary trope in popular culture.
Classically, chalk outlines are drawn in white or bright yellow chalk, but paint or white tape may also be used. In the case of a body, a chalk outline might be drawn immediately before the body is to be removed, but after the medical examiner has examined the body. [1]
Chalk outlines in practice were typically rough shapes of the body's position and did not include specific arms and leg orientation. [2]
While chalk outlines were occasionally used in the past, they were often drawn by the police for press photographers, as opposed to investigative purposes. This allowed the press to take a picture and represent the scene accurately without graphically depicting a body.[ citation needed ]
Some sources indicate that, while not part of official procedure, some uninformed investigators may occasionally draw chalk outlines, particularly in non-homicide accidents. [3] The term "chalk fairy" is occasionally used to describe an officer that makes the chalk outline, often without authorization and while unwittingly contaminating the scene. [1]
While the use of chalk is uncommon, investigators may make smaller marks, or use removable flags, index cards, or markers, to indicate important positions, particularly if other references are not available. [4]
Chalk outlines of bodies are a familiar trope in popular culture. They are often used in humorous ways, depicting awkward positioning or meticulous precision, or portending a character's impending death by having them prematurely fall into a drawn outline. The Naked Gun series made extensive use of the prop, as have a number of other comedies.[ citation needed ]
More generally, the term has become synonymous with tragic death and has been used in literature, music, and visual arts. Some author guides have listed the procedure as standard. [5]
A detective is an investigator, usually a member of a law enforcement agency. They often collect information to solve crimes by talking to witnesses and informants, collecting physical evidence, or searching records in databases. This leads them to arrest criminals and enable them to be convicted in court. A detective may work for the police or privately.
Forensic anthropology is the application of the anatomical science of anthropology and its various subfields, including forensic archaeology and forensic taphonomy, in a legal setting. A forensic anthropologist can assist in the identification of deceased individuals whose remains are decomposed, burned, mutilated or otherwise unrecognizable, as might happen in a plane crash. Forensic anthropologists are also instrumental in the investigation and documentation of genocide and mass graves. Along with forensic pathologists, forensic dentists, and homicide investigators, forensic anthropologists commonly testify in court as expert witnesses. Using physical markers present on a skeleton, a forensic anthropologist can potentially determine a person's age, sex, stature, and race. In addition to identifying physical characteristics of the individual, forensic anthropologists can use skeletal abnormalities to potentially determine cause of death, past trauma such as broken bones or medical procedures, as well as diseases such as bone cancer.
The police procedural, police show, or police crime drama is a subgenre of procedural drama and detective fiction that emphasises the investigative procedure of police officers, police detectives, or law enforcement agencies as the protagonists, as contrasted with other genres that focus on non-police investigators such as private investigators.
Police diving is a branch of professional diving carried out by police services. Police divers are usually professional police officers, and may either be employed full-time as divers or as general water police officers, or be volunteers who usually serve in other units but are called in if their diving services are required.
A scenes of crime officer (SOCO) is an officer who gathers forensic evidence for the British police. They are also referred to by some forces as forensic scene investigators (FSIs), crime scene investigators (CSIs), or crime scene examiners (CSEs). SOCOs are usually not police officers, but are employed by the police forces. Evidence collected is passed to the detectives of the Criminal Investigation Department and to the forensic laboratories. The SOCOs do not investigate crimes or analyse evidence themselves. To be a SOCO, at least 5 GCSEs at Grade level 9 - 4 are required.
A cold case is a crime, or a suspected crime, that has not yet been fully resolved and is not the subject of a current criminal investigation, but for which new information could emerge from new witness testimony, re-examined archives, new or retained material evidence, or fresh activities of a suspect. New technological methods developed after the crime was committed can be used on the surviving evidence for analysis often with conclusive results.
A crime scene is any location that may be associated with a committed crime. Crime scenes contain physical evidence that is pertinent to a criminal investigation. This evidence is collected by crime scene investigators (CSI) and law enforcement. The location of a crime scene can be the place where the crime took place or can be any area that contains evidence from the crime itself. Scenes are not only limited to a location, but can be any person, place, or object associated with the criminal behaviours that occurred.
Trace evidence occurs when objects make contact, and material is transferred. This type of evidence is usually not visible to the naked eye and requires specific tools and techniques to be located and obtained. Due to this, trace evidence is often overlooked, and investigators must be trained to detect it. When it comes to an investigation trace evidence can come in many different forms and is found in a wide variety of cases. This evidence can link a victim to suspects and a victim or suspect to the crime scene.
Bloodstain pattern analysis (BPA) is a forensic discipline focused on analyzing bloodstains left at known, or suspected crime scenes through visual pattern recognition and physics-based assessments. This is done with the purpose of drawing inferences about the nature, timing and other details of the crime. At its core, BPA revolves around recognizing and categorizing bloodstain patterns, a task essential for reconstructing events in crimes or accidents, verifying statements made during investigations, resolving uncertainties about involvement in a crime, identifying areas with a high likelihood of offender movement for prioritized DNA sampling, and discerning between homicides, suicides, and accidents.
The FBI method of profiling is a system created by the Federal Bureau of Investigation (FBI) used to detect and classify the major personality and behavioral characteristics of an individual based upon analysis of the crime or crimes the person committed.
The Baltimore Police Department plays an integral part in The Wire.
Crime scene cleanup is a term applied to cleanup of blood, bodily fluids, and other potentially infectious materials (OPIM). It is also referred to as biohazard remediation, and forensic cleanup, because crime scenes are only a portion of the situations in which biohazard cleaning is needed. Incidents which may require this type of cleanup include accidents, suicide, homicides, and decomposition after unattended death, as well as mass trauma, industrial accidents, infectious disease contamination, animal biohazard contamination or regulated waste transport, treatment, and disposal.
The Night Gardener is a 2006 crime novel by George Pelecanos. It is set in Washington, DC and focuses on homicide detective Gus Ramone, and ex-cops Dan "Doc" Holiday and TC Cook as they investigate the possible return of a serial killer.
Forensic art is any art used in law enforcement or legal proceedings. Forensic art is used to assist law enforcement with the visual aspects of a case, often using witness descriptions and video footage.
The Bureau of Indian Affairs Police, Office of Justice Services, also known as BIA Police, is the law enforcement arm of the United States Bureau of Indian Affairs. The BIA's official mission is to "uphold the constitutional sovereignty of the Federally recognized Tribes and preserve peace within Indian country". It provides police, investigative, corrections, technical assistance, and court services across the over 567 registered Indian tribes and reservations, especially those lacking their own police force; additionally, it oversees tribal police organizations. BIA services are provided through the Office of Justice Services Division of Law Enforcement.
Golden Gate Killer is an interactive police detective simulation developed by American studio Interworks and released in 1995, and published by Grolier Electronic Publishing Inc and 3 Prong Plus. The game is based on the real life murder case of Colvin McCright. The game was released for Macintosh, Windows 95, and Windows 3.1.
Contaminated evidence is any foreign material that is introduced to a crime scene after the crime is committed. Contaminated evidence can be brought in by witnesses, suspects, victims, emergency responders, fire fighters, police officers and investigators.
Evidence packaging involves the specialized packaging methods and materials used for physical evidence. Items need to be collected at a crime scene or a fire scene, forwarded to a laboratory for forensic analysis, put in secure storage, and used in a courtroom, all while maintaining the chain of custody. Items might include DNA, drugs, hair samples, body parts, blood samples, sperm, knives, vomit, firearms, bullets, fire accelerants, computers, checkbooks, etc.
