police scientist prepares vial with distilled water in microcentrifuge, specialist investigates dna from homicide case in crime

criminologist crime laboratory csi dna examination evidence glass biotechnology criminal analysis analyze blood examining experiment criminology trace ballistic measurement case expertise fingerprint forensic science home inspector investigate investigation investigator lab microcentrifuge murder person police preparation proof research sample scene scientist specialist technician test violence broken disambiguation collected prepares vial distilled water investigates homicide conceptual