I can't remember the name of a movie. I can only remember parts of the film. It was a horror movie an I think it had some down syndrome guys in a forest killing these young people when they entered the forest. The guys had a shack where they lived and kept all their weapons. I think one of the killers survives because he is like a zombie... he can't die. Anyone know which film it is?

Could be Wrong Turn!

I would also go with wrong turn.

That's the one!
Thanks heaps :)