Wandering if anyone can help. I am searching for a film that I hired from a video store many years ago. All I can remember is a couple adopt a young boy who is quite creepy. During the film some deaths occur to various people and it seems the boy could be responsible (I think the boys parents were bad criminals or something) I do remember vaguely that some other boy was bullying him and then something nasty happens to him. Anyway at the end It turns out that the killings were done by the boys father who breaks into the house and tries to get the boy back. It's really bugging me as I didn't recognise any actors/actresses so can't look it up.

Might be Relative Fear (http://www.imdb.com/title/tt0110965/)