cGorg, I found this on the saintautumn blog - this sounds to me like the "new cop" who was sitting across form Tom Thumb was there expressly to stop the Wetterlings when they turned into their road and drive them home.
"We finally arrived at our road and it was a nightmare. There was a squad car, and the police stopped us and drove us home."
I also saw another mention of the guy arrested for burglary who was a previously convicted sex offender. (I'm not sure if saintautumn is an earlier blog of Joy's or done by someone else that posts here at WS, they could just be updating it as we find new information here.)
"Eighteen months after Jacobs disappearance a man was arrested for burglary in St. Cloud, Minnesota. Upon running a criminal background check, law enforcement officials discovered that the man was a previously convicted sex offender. Further, the St. Joseph police learned that in October, 1989 the man had lived closer to Jacobs abduction site than did the Wetterling family; yet, local police had not been aware of his presence within the community. In fact, unbeknownst to local police at the time of Jacobs disappearance, there were halfway houses in the St. Joseph area that housed sex offenders upon their release from prison. This information was disconcerting because during the search it was commonly assumed that Jacobs kidnapper had attempted similar behavior in the past. The St. Joseph police lamented that prior knowledge of the presence of these previously convicted sex offenders may have prevented Jacobs abduction in the first place."
The part I have bolded below - it sounds like there were only one set of tire tracks in the driveway. Because once Kevin told them he had left the tracks they "abandoned the idea of a car taking Jacob." "THE" tracks implies there was only one set, IMO. So I think the discrepancy we're seeing in the timeline shows there were no other fresh tire tracks in the driveway.
"In 2003 the long held belief that the abductor took Jacob away in a car was abandoned when a man named
Kevin, came forward to tell the police he had left the tire tracks in the driveway after hearing about the abduction on a police scanner and rushed to the scene in his car leaving the tire tracks behind. The driver told authorities that in 1989 he had given his name and explanation for being there to an officer at the abduction scene. No record of the conversation exists though. Also, the boys did not see or hear a vehicle that night of the abduction, so the police believe that the abductor got away with Jacob on foot, which would make the abductor someone local."
Info in quote marks taken from...
http://saintautumn.wordpress.com/