Crime scene refers to the immediate setting in which a criminal event occurred. The area may include the victim’s body, suspects’ homes and even their digital devices. Crime scene technicians use various techniques to collect and preserve physical evidence for prosecuting criminals. This infographic, created by Hilbert College Global’s online Bachelor of Science in Criminal Justice program, explains how they do so.
First, forensic specialists must ensure the safety of the crime scene and all those working on it. They make sure that the scene is protected by a crime-scene fence, and that all witnesses are kept away from the crime site. Then they start identifying and securing evidence, determining whether it is relevant or not.
Once they have determined the type of crime, forensic experts will anticipate what types of evidence are likely to be found at the scene. They will create a plan of action, taking into account weather conditions, time of day and possible contaminants that might damage or destroy evidence. They will also consider what other sources of information are available to them.
A crime-scene investigator – usually the first one to arrive at the scene – will establish a pathway that authorized personnel can follow to re-enter the crime-scene after it has been locked down. He or she will take a photograph of the proposed pathway, then, dressed in sterile crime scene clothing, he or she will enter the scene to perform his or her duties.