Witchtrap (1989)

The entrepreneur Devon Lauder hires the paranormal investigator Agnes Goldberg to go with her team to the inn he has inherited from his evil uncle Avery Lauter in a county in California since the place is haunted. He also hires the security agency owned by the skeptical Murphy to protect Agnes's group. On the arrival, they stumble upon the strong but creepy gardener Elwin. Soon Agnes decides to have a seance, and immediately after, the video technician Ginger Kowowski is murdered in the shower, but Murphy and his men believe Elwin is the killer. But soon enough, they learn that they are wrong.