did say in the end that van, the thibodeau van, that was the van. >> reporter: the witness reported seeing more than one man, so investigators also brought in richard'sher, gary, for questioning. the brother said he was home asleep that morning and his girlfriend vouched for him. but gary thibodeau didn't have a spotless record. he had an outstanding warrant on a minor drug charge in neighboring massachusetts. >> they extradited him to massachusetts, which was an odd thing on a drug charge. >> reporter: in the county jail, thibodeau struck up a conversation with a fellow prisoner. >> him and gary are sitting in there shooting the breeze, and they get talking about something like all of them do. he says, yeah, i killed this girl from oswego. >> reporter: he gives it up, though? >> he gives it up. >> reporter: brother gary eventually is said to have told two prisoners about his involvement in the crime. that he and heidi used drugs together and that she feared gary was going to screw her over in a drug deal. and with that jailhouse confession, investigators now believed they had their case. the two brothers, drugs, an abduction and murder. >> i was wai