First, Ramrod, welcome to the board. It is always nice to have a local’s perspective.
There were certainly some law enforcement officers in and around Ozark who turned out to be really bad guys. Chris Ford at the DCSO and Driggers, chief of Level Plains, are two that come to mind. (Both attested for inappropriate behavior towards minors). The cracked window, drivers license on dash, the fact that they stopped for someone -when friends and family said they were street smart. These are circumstances that definitely could lead one to think a LEO might be involved. The dark blue truck is interesting also.
One more thought, it would be nice for an LEO to post on this board with contact info for tips and such. Shaun Smith (ABI) posted several years ago, but my understanding is he is no longer working this case.