MSNBC Dateline Extra October 14, 2019 03:57:00
Prison issue. >> in the collar of the sweatshirt is the word, "backbone." and i'm thinking, "okay. that's a nickname." >> tests on that sweatshirt revealed dna from various people, including an unknown male. but the prosecutor said there was no match when that male dna was run through the national database. still it seemed to be a breakthrough for team david. proof that someone else was in the garage that night. >> we knew that that was probably the key to solving this. now, we didn't know that person by name. by god, we knew them by dna profile. >> reporter: finally, it was up to the jurors. ...