My sister was very rebellious -- skipping school, sneaking out her 2nd floor bedroom window, running with an older crowd (with cars). They never got the police involved, but I remember my dad driving the neighborhood looking for her, and my mom calling all her friends' parents. She seemed to always be grounded, with all sorts of privileges removed, but it didn't do much good. They'd meet with the Dean of Girls (in those days that was the Attendance Office), her teachers, the principal, yadayada. Her doctor wanted to put her on amphetamines (early treatment for hyperactivity) but our folks didn't want to go that route, so they took her to a psychologist instead. He basically said she was a feisty, independent, creative personality type, and "traditional" parenting styles wouldn't work for her -- she'd just rebel to assert her individuality. So they loosened up a bit, and gave her some more autonomy, responsibility, and trust.