disappeared, never checked paper records, and never checked the carpet inside denny's apartment. >> they can spray a chemical on this alleged evidence and it can be tested. that was never done. >> visible blood spots were found on denny's apartment walls, but in the percent sent out for testing, none came back for hannah. >> no dna, no blood. you theorize she was killed there, but yet there's no trace of her. >> yep. >> nor was there a trace of denny in or around hannah's car. despite the ambiguous evidence, in october 2000, 20-year-old denny ross stood trial for the rape and murder of hannah hill. he pleaded not guilty and faced the death penalty if convicted. >> he beat her into submission so he could rape her. >> two young prosecutors argued