The Man Behind the Slaughter?

Gregory need a scholarship to get into a good college, and there's only one that will get him the support he needs. But this scholarship requires volunteer hours. No problem, the local retirement home has plenty of volunteer opportunities and they assign Gregory to a seemingly normal old man.This poor guy gets so easily confused, and he gives off bad vibes, but Gregory resigns himself to his new job. But then the man starts talking about death and murder, and Gregory is pulled into a family nightmare the likes of which he's never seen.