The Trauma and Crime Scene Technician (TCST) certification covers the unique situations encountered when performing trauma and crime scene cleanup, regardless of surface, item, or location. The certification demonstrates knowledge of the various procedures and precautions taken when performing work at a trauma/crime scene and is based on the ANSI/IICRC S540 Standard for Trauma and Crime Scene Cleanup. Upon achieving the certification, you demonstrate you know about inspecting and investigating human blood and other potentially infectious material (OPIM) contamination to establish hazard assessments, work plans, and procedures for cleaning and safely transporting contaminated material.