>> i put a bunch of stuff in the van that i drove around with because i knew that eventually they'd search my van and find them. >> during larry's trial, his twin brother, gary, tried to provide him an alibi. still, the federal prosecutor got hall convicted of kidnapping jessica roach. >> in the federal system, if you're guilty of a kidnapping, if that kidnapping resulted in a death, them under the sentencing guidelines, it's mandatory life term. >> the jessica roach case was over, but the disappearance of tricia reitler remained unsolved and her parents, gary and donna, would not stop looking. >> we walked the sides of the roads. we walked the riverbeds. we looked under the culverts. we ended up going to crack houses because somebody had a lead. >> if you see something on the side of the road, a garbage bag, whatever, it's like, could that