had a hard time explaining. the first was a fingerprint found on the upstairs office closet door, not far from jenna's body. that print didn't come back? anybody >> know. >> then, there was a shoe print left in blood, next to janet. >> could you tell anything about this bloody footprint? >> it was right by janet, but nothing definitive about the type of shoe, the make, or anything. >> finally, analysts found unidentified dna mixed with janet's blood on a door leading to the side entrance. none of that forensic evidence could be traced to raven, janet or anyone connected to the investigation. >> those are things, as an investigator, you absolutely want to try to figure out. >> technicians process the house, detectives began interviewing raven, hoping he could help point in the direction of the killer. >> raven was visibly crying, he looked like he was distraught and upset. he, himself, said he had new