Related Clues:

• Forensic evidence
• Messenger molecule, familiarly
• It makes you you
• Genetic "messenger"
• Messenger letters?
• Letters after "messenger" or "transfer"
• Cellular transmitter
• Basis of many positive IDs
• Crime lab evidence, briefly
• Watson and Crick's lab material
• Kind of profiling
• It takes the shape of a double helix
• Single-helix stuff
• Forensics focus, often
• It's stranded in police labs