The Chumscrubber (2005) on Netflix

The Chumscrubber is a dark comedy about the lives of people who live in upper-class suburbia. It all begins when Dean Stiffle finds the body of his friend, Troy. He doesn't bother telling any of the adults because he knows they won't care. Everyone in town is too self consumed to worry about anything else than themselves. And everybody is on some form of drug just to get themselves through the day. After Troy's death, local drug dealers at the school run out of their stash. They convince Dean to get Troy's stash or they are going to kill his brother that they kidnapped, but they grabbed the wrong kid.