>> it was a sweatshirt that had graphics on it of sign language. we knew right there there was a tie to the deaf community. >> testing proved it was darlene's blood on the sweatshirt, but someone else's dna was found inside the sweatshirt. >> i took cuttings from the inside of the sweatshirt hoping that one of them had transferred enough dna or skin cells inside. to get a full profile. i was fortunate and did get a profile and that matched daphne wright. >> by being able to put daphne wright inside a sweatshirt that had car len's blood and tissue on the front of it was extremely important. >> the sweatshirt was critically important in this case but it was one of the few pieces that tied both victim and suspect together.