what's yours? >> yeah. double harebrained. >> reporter: alexander bennett was sent to prison and required to give dna. now, years later, that dna was tying him to heidi's murder back east in maryland. for baltimore prosecutors garrett glennon and matt breault, the dna was an enticing lead but far from definitive proof. >> it was enough to say it looks like it came from him, you know? but we can't say it's definitively his. so there was more investigation to do. >> reporter: so, the detectives went to work, looking for another connection between colorado native alexander bennett and the maryland murder. all the usual computer searches failed, but when sergeant meyer had the maryland state police mine an offline database. >> i get this phone call from the trooper and he tells me. he said, "i got alexander bennett somebody running a wanted check on him march 30th of 2000." >> a maryland officer. >> in maryland.