Blue Ruin (2013)

Dwight Evans' lives his life as a beach vagrant. He has no contact with his sister, and his parents were murdered ten years prior. When he gets word that his parents' killer, Wade Cleland, is set to be released from prison, Dwight decides that he has nothing left to lose and sets out on a quest to avenge his parents' deaths. Dwight succeeds in killing Wade, but complications emerge when his botched getaway allows the Cleland family the opportunity to vow revenge.