Lots of folks seem to be focusing on one perp, but LE is looking for two specific vehicles that they feel may be related to this crime. Out of all the other vehicles that night on a fairly busy highway - and at that time of night - those two stood out. Out of all the other vehicles riding through Barron and adjacent communities that night - and at that time of night - those two stood out. Why is that?
JMO.
Vehicles may have been acting suspicious in some way - passing back and forth repeatedly, going very slowly or speeding, etc. It's entirely possible neither vehicle was involved.