>> so that was kind of the breaking point of the case is that we knew luke was involved. >> police with nothing to lose told hasler about the call. and now he changed his story. >> luke's story was that he had accidentally hit her with his truck. that she was in the middle of the road when he came around a corner or something. >> hasler said he put michelle in the back of the truck to take her to the hospital. but michelle regained consciousness and fled when he stopped at a traffic light. >> luke said she then jumped out of the back of the truck and that was the last he knew. >> this story was consistent with the eyewitness accounts. they claimed they saw someone who looked like michelle in the back of his truck but later she was gone. >> i hit someone with a car and there was blood. that's normal. >> but investigators needed more evidence if they were going to bring luke hasler to justice. >>> there were lots of unanswered questions about what happened to michelle johnson. luke hasler said he'd accidentally hit her with his truck. but the autopsy didn't support his story. >> one would expect to find fractures. f