The Westerly Serial Killer is the main antagonist of the main Stunt Vid series of videos. Very little is actually known about the Westerly Serial Killer, though he is shown briefly in Stunt Vid 3.

The Westerly Serial Killer is responsible for a series of murders that always take place in Westerly. Despite the killer almost always committing his murders in broad daylight, the Westerly Police Company and almost anyone else who try to solve the case, cannot.