"CSI” find (3)

I believe the answer is:

dna

(Other definitions for dna that I've seen before include "Main constituent of chromosomes" , "Genetic code" , "It carries genetic information" , "Substance in chromosomes that stores genetic information, used by police" , "Substance that stores genetic information - often used by police" .)

I've seen this clue in the King Feature Syndicate.

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