A really spooky and chilling ghost story involving a kid in the 1960's (the always otherworldly looking Lukas Haas) who keeps seeing the ghost of a dead little girl from years earlier, along with the re-enactment of her murder. This movie is lesser known than a lot of others but it's really worth seeking out, because the creepiness and disturbing nature of the mystery is quite effective. In fact, the dark material may be the reason that this film is not better known- the topic of child murders is unsettling enough without all the ghosts thrown in, but it really is quite scary, and the more serious subject matter adds to the weight of the story. This one will definitely stick with you, and it happens to be set on Halloween too.
1988 Trailer (this is a really weird trailer for this movie- it's trying to make it look a LOT more lightweight than it actually is, and again, I think that was due to the subject matter involving children):