The goof items below may give away important plot points.
At the end of the movie, it is revealed that Philip's mutilation of Sarah is what actually killed her. It is stated that Philip is facing charges while Chris and Marty are apparently free to go on with their lives. However the mutilation of Sarah was a conspiracy involving Philip, Chris and Marty (in an attempt to frame Vince). Since Chris and Marty were complicit in Sarah's death, they would also be facing some sort of legal action.