they confiscated the tire and greg laskowski made an impression in material similar to the soil at the crime scene. he also took an impression of the side walls. the comparison was remarkably clear. the impressions forming the letters "v," "s" and "d" at the crime scene were identical to the letters on the side of rodney berryman's spare tire. and numerous scratches on the tire known as accidental markings matched in both samples as well. rodney berryman was not told about this evidence. during his formal interrogation, he was asked if anyone else ever drove his truck. he said, "absolutely not." >> when rodney berryman says that no one ever, under any circumstances, drives his vehicle, well, that points pretty strongly towards him being in the vehicle. >> he was making negative -- what we call negative statements. he was lying to me. and when somebody does that, you let them keep going with that because the more they lie, the deeper they dig their hole. >> berryman looked like he had been in a fight. >> i did recall seeing a scratch on his face, and i asked him when he got that scratch