[Zeke]

The police have the right to detain even if it requires a trip to the station. That can be intimidating and they know that. Sure, the people at the scene have the right to say nothing. The police will always take this as a sign of guilt in one way or another. This is also intimidating, but it's how it works.

I do believe the young man has the right to recant his statements at any time. He has to duty to tell the truth the best he knows it to be under oath in a court. In the meantime, STFU. The accident investigators will get to the bottom of this, you can count on that.