Acolytes (2009) on Netflix

Plot summary

James and Mark are in their last year at school and still fear Gary Parker, who abused them when they were younger and who is now out of prison. A missing teenage girl named Tanya is run down by a car in a pine forest. Wandering there alone, Mark sees a man burying a body. He and James bring James's girlfriend Chasely to dig up the grave, and they find the body of a young woman with a small Canadian flag beside it. An attempt to tell the police comes to nothing. They track down the man's four-wheel drive, learn that he is Ian Wright, and blackmail him into dealing with Gary Parker.