The Watcher

Burned out after failing to bust a sadistic serial killer in Los Angeles, FBI agent Joel Campbell (James Spader) retires to Chicago. But the killer (Keanu Reeves) refuses to leave the lawman alone, and begins furnishing new clues designed to drive him mad. To motivate Campbell to rejoin the cat-and-mouse chase, the killer sends photos of his next victims. But it's up to Campbell to try to save them first.