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Ensuring that later arriving investigators are fully apprised of the evidence discovered.
Removing evidence at risk of imminent destruction by the fire or the structural collapse of the damaged building.
Preserving transient evidence (e.g., trace evidence, shoe prints, tire impressions).
Obtaining information about victims and witnesses (i.e., their names, addresses, and telephone numbers).
Retaining and securing clothing items removed from victims and suspects.
Isolating items or areas containing evidence with rope, barrier tape, barricades, or sentries.
Covering items or areas containing evidence with objects that will not contaminate the evidence (e.g., clean boxes or tarpaulins).
Recording observations through written notes or voice recordings.
Flagging items of evidence with cones or markers.
Leaving bodies undisturbed.
Avoiding needless destruction of property.
Limiting excessive fire suppression, overhaul, and salvage.
Establishing the Role of First Responders
Preserve the Fire Scene
Source: National Institute of Justice, Fire and Arson Scene Evidence: A Guide for Public Safety Personnel