It's summer. Teenagers in rural areas tend to party on country roads. Life isn't all that exciting. Suddenly, though, there's a lot of excitement in town. There are reporters staying at local hotels. Some kid, maybe even the child of a police officer or searcher, thought it would be really funny to toss some old training wheels from his sister's bike into a field. That's what I think happened. That third piece of evidence could be a beer can. There's your potential DNA. You would think, though, that the sheriff wouldn't be as concerned as he has seemed if he suspected it was a prank.