charlie mccormick couldn't see any good reason for lynn to get under a jeep held up by makeshift jacks. >> reporter: mccormick believes the original investigation was incomplete. >> there's a lot of things that could have been looked at that would be easier to look at then than now. >> reporter: for example, what caused the jeep to fall? harold said he thought it happened when he tossed the tire into the trunk. but this photograph shows a shoe print on the front right fender. >> i would've jumped all over that footprint. that have been analyzed, compared to the shoes that everybody had on that was at the scene, whether it be harold henthorn or his wife or fire department or anybody. >> reporter: but no one did. and no one ever checked the jack harold said wasn't working to see if it was really broken. no one ever checked with the restaurant that the henthorns were either heading to or coming from, depending on which version of harold's story, if any, was true. >> i interviewed the restaurant employees to see if they actually did have dinner there that night. did they have a fight?