The Good Son (1993)
Following his mother's death, Mark is sent to stay with his aunt and uncle while his father goes on a business trip. Mark befriends his cousin Henry, but Henry begins showing increasingly psychotic behavior that worries Mark. No one believes Mark when he warns them about Henry's intentions. This leads to a climactic confrontation where Henry's true nature is revealed.
8MM (1999)
Private investigator Tom Welles is hired to investigate an disturbing snuff film. His investigation takes him into the seedy underworld of the porn industry as he seeks to identify the girl in the film. Tom struggles to maintain his grip on reality as he is exposed to increasingly disturbing images.