From the movie River's Edge -
Directed by Tim Hunter and starring Crispin Glover, Keanu Reeves, Daniel Roebuck, Dennis Hopper, Joshua John Miller. A group of high school friends discover that they are in the presence of a killer. One of them, Samson, has murdered his girlfriend Jamie. He brags to his friends about killing her, and when they discover he is telling the truth, their reactions vary.