i know. >> reporter: tony and janet russo had answered all their questions, had been cooperative, and tony even gave them a swab of his dna and his fingerprints. so the police thanked him and the interview, part two. this one a little tougher. >> is there any reason why somebody might have seen your van over there? >> surely i don't have the only pewter ford minivan in this entire town. >> you have the only pewter ford minivan that has that license plate on it. >> that's true. that is is true. i was 11 or 12, way before i would even be exposed to it? did you know, mom? dad? i was infected with hpv. maybe my parents didn't know how widespread hpv is. while hpv clears up for most, that wasn't the case for me. maybe if they had known there was a vaccine to help protect me when i was 11 or 12. maybe my parents just didn't know. right, mom? dad? what will you say? don't wait. talk to your child's doctor today. >>> the day after police interviewed tony russo and his wife, they brought him back in, and again he was cooperative. said he was surprised to be a suspect in, of all things, a murde