Its about a teenage boy who moves to a new school and gets invited to a party by another guy in class and things spiral out of control from there. He goes to the party ends up smoking weed and gets involved in a robbery in a bakery.
There are other guys with them one has curly hair and video records everything they do. They end up ripping off a drug dealer I think(it was a long time ago I watched it) In the end evryone ends up getting killed except for the new kid at school he shoots the last man standing to survive.

It's a pretty violent movie but yet a good one. I thought it was called a history of violence. But I can not seem to find it. Any help would be greatly appreciated.

Thank you