Stranger in the Doorway

The serial killer who killed 12 people has a name, the WOLF. Feb 13th - A beautiful woman living in House #111 wakes up to find someone trying to break in. The next day, someone does break in, but denies saying the house was supposed to be empty, when - The Neighbor walks in smiling. One of these three is the Killer we are looking for. (official distributor synopsis)