Crime/Accident Photo Evidence Indicators for Forensic and Identification Photography. These are plastic numbered signs (1 -15) for use at crime or accident scenes to indicate the location of relevant evidence. Dim. 3.5"w x 2.625" Tall Fabricated of one-piece .050" thick polystyrene material for longlife and durability. They feature a matte finish to reduce reflections and their A-frame form allows for nested storage.