In the Deep Woods (1992)

Joanna mourns for her friend. She's victim of a serial killer, who's specialized on successful young women. He dumps their bodies in the deep woods without leaving any trace - the police is clueless. Shortly after Joanna is addressed by a man, who says he's private eye Paul and investigates for the parents of another victim. His many weird questions worry Joanna - maybe he's the psychopath? Soon she fears to be in danger herself and looks with suspicion on all her friends and relatives.