Here's something that I've been wondering about concerning Kevin's car and tire tracks, that doesn't seem to make sense.
For good reason, there was great attention paid to the tire tracks found in DR's driveway. According to Kevin (who says they're his), his tires had just been installed one week earlier at a St. Cloud tire dealer; if the tracks in question were in fact his; I can't begin to imagine Any Investigation that did not discover that. For one thing, if they were in fact 1 week old tires, it seems to me much more likely than not, that at least one investigator would have recognized that the tracks were made by 'new' tires. This in itself gives you some lead. Other than that; wouldn't investigators have gone to local car and tire dealers for some distance around the St. Joseph area to see whether they could identify what kind of tires had made the tracks, then, from there, investigated the dealers to see who sold and maybe even installed the tires; especially if it had been done only one week earlier. It really seems to me that, even without Kevin coming forward in 2003 that the investigation should have uncovered that information a long time ago.
Following that, whether it's actually an LE position or not, the concept that after Kevin came forward in 2003 and stated that he had driven up the driveway, etc., that for that reason LE discounted that a vehicle had been involved, makes absolutely No Sense Whatsoever! None! I can see No Reason why/how LE could or should conclude that a vehicle was not used.