The art of Crime scene investigation (CSI) consists of making an investigative probe of evidence by qualified law enforcement officers to seek truthfulness for identifying the culprit and finding justice for the victim. A crime scene investigation is a very tedious procedure that includes the complete documentation of a particular location of a crime to find out who committed the criminal act. Crime scene investigation entails a comprehensive reenactment of the events that occurred by locating trace evidence that would connect the pieces of a crime scene. There are no two crime scenes identical, therefore, procedures may differ per crime scene, but all connect to the basics of crime scene investigations.

A Crime scene investigation can be identified as the meeting place for science, logic, and law. It has been established that there is no scene of a crime that does not incur some type of evidence left by the culprit. It is the duty of the crime scene investigator to locate the residue of evidence and connect that evidence with whoever was at the scene of the crime. It is also a fact that any individual entering the crime scene after it occurs is bringing additional evidence into the crime scene, therefore it is very important to limit the number of people entering the scene of a crime for that purpose.

Evidence located in a crime scene needs to be categorized for better identification. Physical evidence can be collected from non-living origins. Types of physical evidence include fingerprints, handwriting examples, clothing, weapons, audio/visual recordings, tire impressions, footprints, fibers, paint, and building materials. Biological evidence includes bloodstains, hair, saliva, and body fluids, all of which are essential to producing DNA.

It is the primary responsibility of crime scene investigators (CSI) to investigate crimes scenes by way of searching, collecting, documenting, photographing, marking, and analyzing physical evidence found at any crime scene. The purpose of a crime scene investigation is to uncover prosecution evidence that will incarcerate the culprit(s) under the full limits of the law.

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