first, when the time comes, be friendly and comfortable speaking to the cops or whatever authority you deal with. don't be a sullen little punk or a scared-ass kid. nobody likes to see that shit. charm them by acting natural, real, maybe a little witty.
tell the cops your friends were just along for the ride and to look out for you. if anything tell them your parents THINK your friends did it too because they believe the friends are a bad influence on you. then roll your eyes and give them the "you know how parents are" face.
then, once you've gotten your friends off the hook, go home and pour bleach all over your parents' house. piss in all the closets. get a bunch of the cheapest fish you can find and stuff it in some deep dark crevice of the house to fester. then make them breakfast one morning and put drano in the coffee.