Witchouse: Blood Coven Directed by J.R Bookwater, 1999

When an old house in a small town is razed to make way for a shopping mall, the crew unearths four unmarked graves. A professor from a nearby university is asked to find out who the bodies are, but when she and her students arrive in town and begin to ask questions, they discover that no one wants to talk to them or help them in any way.