Shockumentary (2015)

A group of college friends named Sky, Chris, Justice and Brit Brit throw a party and decide to rent some horror movies from the local video store. One of the films they rented, a VHS mondo film called "Shockumentary", is pretty standard for a sensational exploitation documentary, until they see a woman tied to a chair and stabbed to death. They notice that the girl has a strong resemblance to their friend, Jennifer, who has gone missing. After the police do not believe their story, they take matters into their own hands and try to find out who is behind the camera of this snuff film.