Dna Compiling News Today

Theft or public drunkenness. >> i think were the first to do it. >> reporter: they say the database helps solve cold cases and will help solve crimes in the future. experts say the number of local agencies getting into the dna business spiked. >> through use of dna, theres cases out there that show you can get more arrests, more convictions. >> reporter: some of those who have given their dna and been cleared of a petty crime find themselves arrested for a more serious crime still on the books. ...