Movies like August Underground

After introducing his desensitised cameraman friend to a scene of numbing terror, and a helpless young woman tied to a chair in his filthy basement, a depraved serial killer starts committing acts of sadistic torture, taking great pleasure in hurting her. Then, when the nightmare is finally over, the depraved duo embarks on a killing spree in the streets of Pennsylvania and New Jersey, abusing, beating, dismembering, and killing all those unfortunate enough to cross paths with them. Of course, the camera captures everything on tape.