Forensic training. Scene of crime officers (SOCOs) zipping up a body bag, containing a mock dead body, as part of a training course. A body bag is used to hold and remove a body from a crime scene. The SOCOs are wearing protective clothing in the form of paper suits, overshoes and masks to prevent contamination of the crime scene. SOCOs provide scientific support to police forces. They establish what evidence is required from a crime scene and the best way to obtain it.