A Guide for Explosion and Bombing Scene Investigation

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◆ Ensure that the scene has been secured, that a perimeter and
staging areas for the investigation have been established, and
that all personnel have been advised of the need to prevent
contamination of the scene.
◆ Ensure that the chain of custody is initiated for evidence that
may have been previously collected.
D. Assess legal considerations for scene access (e.g., exigent circumstances,
consent, administrative/criminal search warrants).
Summary: The investigator will conduct a briefing to ensure scene
safety and security, while addressing the issue of secondary
devices.
2. Ensure Scene Integrity
Principle: The investigator must ensure the integrity of the scene
by establishing security perimeters and staging areas,
contamination control procedures, and evidence collection
and control procedures.
Procedure: Prior to evidence collection, the investigator should:
A. Establish procedures to document personnel entering and exiting
the scene.
B. Establish and document procedures to prevent scene contamination.
C. Establish and document procedures for evidence collection,
control, and chain of custody (see the sample evidence recovery
and chain of custody logs in appendix A).
Summary: The investigator will establish and document procedures
to protect the integrity of the scene.