Inside (2006)
Alex has a disturbing hobby of following strangers...until one night he gets caught. Instead of calling the police, the couple--fascinated by Alex's resemblance to their dead son--asks him to stay, and Alex finds himself trapped in a horrifying existence of desperation, despair, and insanity. kidnapping, despair, insanity, son, fascination, grief, stalking, couple, guilt, death, parents, voyeurism, accident, kleptomanic, caught
ETC.
