Here are a couple links, one in which the sheriff said it doesn't completely rule out a car being used, and one (by the St. Autumn blog) which states "In 2003 the long held belief that the abductor took Jacob away in a car was
abandoned when a man named Kevin, came forward" - so I think that may be the source of our conflicting information. I'm not sure who runs (or ran) the St. Autumn blog, although I've always thought (so, JMO) it was an early blog of Joy's since both blogs share identical photos, and Joy has a copyright notice to prevent anyone else using her photos - excepting the photos she took from the St. Cloud Times, of course. If anyone knows it is someone else's blog, please feel free to correct that.
Here is the link to the sheriff's comment:
"This does not completely eliminate the possibility that a vehicle was used, although in light of the new information that possibility has diminished,'' the Sheriff's Office said." (Photo of full article at link)
http://s100.photobucket.com/user/shergal1/media/Screenshot2015-01-09at93150PM.png.html?sort=4&o=42
- Mpls. Star Tribune, Feb. 27, 2004
From newsmax.com archives:
http://nl.newsbank.com/nl-search/we/Archives/
Here is the link to the St. Autumn comments:
"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."
(This quote is directly under the photos of what Jacob was wearing when taken.)
http://saintautumn.wordpress.com/
This comment appears near the bottom of that same link.
"October 2003: The driver of a long-sought vehicle comes forward. Authorities rule him out as a suspect in the abduction. The theory of the case changes, leading investigators to focus on local suspects who could’ve been on foot when snatching Jacob."
So people only reading the St. Autumn blog would be under the impression that a car was ruled out. Since the sheriff's comment is only available in archives with a paid subscription, not as many have access to that. I think that explains the discrepancy in our "facts". I guess, I'd take the sheriff's word over a blogger, JMO.
So, IMO, a car was never completely ruled out. As stated above, they probably never looked for the second freshest prints, or possibly the abductor parked elsewhere.