O Mutilador

A young boy accidentally kills his mother while playing with his father's gun. Distraught, his father has a break from reality and, years later, the young man takes his college buddies to his family's beach house for a little fall break fun and his father shows up, still angry at what his son did, so he decides to punish him and his friends by going on a bloody rampage.

You have to put together a lot of pieces yourself as you watch The Mutilator. Where has this nutty father been all this time? Why did he pick now to go on a killing spree? This movie isn't one for nuanced character development and deep psychological insight, but the murder scenes are a gory delight and a few scenes crackle with some suspense.