My two brothers were as kids. They were out late at night and the cops picked them up because some kids in that neighborhood had been reported stealing car stereos (it wasn't my brothers).
The cops put them in two separate interrogation rooms and told them that they'd cut a deal with whichever one narced on the other first. Of course neither one gave them anything. So the cops held them in cells overnight.
One of them was woken up at 4:00AM by the cops and told that the other one had narced, and that he would have to narc too if he didn't want to take all the blame, but he just said "bullshit" and went back to sleep.
The cops kicked them both out around 6:00AM. Seperately. The dumb one hitchhiked home, and the smart one found a convenience store and asked to borrow the phone. My parents were apparently worried half to death and had been up all night. My family didn't really trust cops so much after that.