Black Butterfly (2008)

Richard has been living alone since his wife left. His reclusion is broken when mysterious vagabond Jack comes to his rescue. Richard offers to put him up for a few days in exchange for some odd jobs. But the press soon starts hinting at a serial killer on the loose. Richard begins to have doubts: could Jack be the murderer? Richard panics and tension mounts when he discovers blood in the house. But what if Richard has his own demons to hide?