Charles Bach, aka "The Iceman," was a contract assassin.
Bach was employed for ten years by crime boss Frankie Marino, until Marino stood trial. After that, the two men parted ways, and Bach sold his services freelance.
In 2008, he was hired by art thief Daniel MacGraw to kill champion boxer Ray Regis, who had unknowingly stumbled on MacGraw's theft. His first attempt, planting a bomb in Regis's training gym, missed its target but killed Regis's friend, Eddie.
On the night of Regis's title bout, Bach prepared to shoot Regis from a sniper's nest. However, Adrian Monk, noticing the rifle barrel from below, rushed up to the nest and tackled Bach, managing to delay him for a few vital moments, until Captain Stottlemeyer and Lt. Disher of the SFPD followed on Monk's heels, shooting Bach dead just as he regained control of his gun. (Monk: "Mr. Monk Takes a Punch")