Lt. Cliff "The Tool" O'Toole is the commanding officer of the LAPD Robbery Homicide Division's Open-Unsolved Unit in 2012. Another nickname for him is O'Fool. Prior to transferring into the OUU, he supervised the Van Nuys detective unit in Valley Bureau. He replaced Lt. Gail Duvall. While Duvall was inclined to hide in her office, O'Toole is the opposite. He keeps his windows open and is out in the squad room often. Unfortunately, he is also a micro-manager who believes he was sent to "clean house." Naturally, he is disliked by all of the detectives.