[dylandrop]

Also the OP mentioned something about not being told his Miranda rights -- keep in mind the police only have to tell you your rights if you're being interrogated.

If they're trying to haul your friend off for something, the best thing you can do is say nothing about it, sadly. Otherwise you'll be brought in for obstruction of justice which will likely be deemed a misdemeanor (as opposed to an infraction, which is sorta bad news for you).