I think it is very likely that Jacob and this other boy, Jared, were abducted by the same person:
Earlier in the year, a 12-year-old boy had been pulled into a car and molested. The boy had just finished ice skating with friends and was walking home alone. When the man dumped the boy out of the car, he was told to run. If he didnt, he would be shot. Not only did the methodology fit, but so did the geography.
This crime happened about 10 miles from where Jacob had disappeared.
http://www.sequoyahcountysheriff.org/jacobwetterlingact.htm
A former Cold Spring man, who was abducted and assaulted just ten months before Jacob Wetterling disappeared, is coming forward to tell his story publicly for the first time in hopes it will trigger new leads in the Wetterling case.
Jared's story begins on a winter night in Cold Spring, Minnesota. It was Friday, January 13, 1989.
http://www.kare11.com/news/news_article.aspx?storyid=63324