Who is the killer in I Know What You Did Last Wednesday?

Ben Willis who was seeking revenge on David Eagen for crashing and causing the death of his daughter, Susie (or Sue or something like that). THen after when Juile, Ray, Barry, and Hellen hit him and plan to hide their murder, he really isn't dead and goes after the teens.

Ben Willis who was seeking revenge on David Eagen for crashing and causing the death of his daughter, Susie (or Sue or something like that). THen after when Juile, Ray, Barry, and Hellen hit him and plan to hide their murder, he really isn't dead and goes after the teens.