Hangman's Curse (2003)

Synopsis
A family of paranormalists investigates the strange goings-on at a high school still reeling over a student's very public suicide in this teen thriller. Hangman's Curse concerns the further exploits of the Veritas Group, a loose collective of people committed to researching supernatural mysteries. The group's members include the Springfield family -- parents Nate (David Keith) and Sarah (Mel Harris) and Elisha (Leighton Meester) and Elijah (Douglas Smith) -- whose current assignment takes them to the aforementioned high school. There, they find that Abel, the teen who took his life, had been long ostracized by various cliques in the school -- jocks, popular kids, and the like -- all of whom are falling prey to mysterious ailments. As Nate and Sarah watch from the sidelines, it's up to Elisha and Elijah to pose as students to get inside the mystery. Hangman's Curse was based on the novel by Christian author Frank Peretti. ~ Michael Hastings, All Movie Guide