All I remember it was like a horror or suspense movie, where he drowns a little girl, his step daughter I think, and then her ghost comes back to haunt him and eventually he goes crazy and dies. I was a little girl when I saw it scared de heck out of me then :P I'm 24 now. Does anyone know?

George C. Scott rather than Christopher Reeves, but maybe The Changeling (http://www.imdb.com/title/tt0080516/)

FYI -- It's Reeve (no "s" at the end).