Thread:DPSII/@comment-31755529-20170516160523/@comment-30158554-20170519141840

The killer was really a paramedic named Roy Burns, his son was killed early in the film by an angry teenager and seeing his son's butchered remains drove him crazy and he impersonated the then deceased serial killer Jason Voorhees and killed everybody he deemed responsible for his son's death. His identity wasn't revealed until the end though.