
278 Private Security and the Investigative Process, Third Edition
Samples of paint and glass for examination.•
Chemical tests for intoxication.•
Autopsies to determine cause of death.•
Medical descriptions of injuries.•
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Proceeding to the third level, technical preparation, the investigator begins to map out or graphi-
cally portray the incident. It may involve activities such as:
Elementary ground photogrammetry.•
Mapping from perspective template photos.•
Matching vehicle damage areas and preparing maximum engagement, rst contact, and •
disengagement diagrams.
Preparation of after-accident situation map.•
Simple speed estimates from skid mark ...