The skitso is given meds by a doctor that is convinced that the meds will fix him before the state exicutes him for a string of serial murders that one of his personalities has committed. The movie takes place in the desert during a flash flood. All of his personalities are trapped at a motel between two washouts. If anyone can help me find the name of this movie or crazy eyed actor I would appriciate it.

Movie is Identity (2003) (http://www.imdb.com/title/tt0309698/)

Possible the shifty eyed guy is Pruitt Taylor Vince (http://www.imdb.com/name/nm0898546/)