Barret Walz: Barret Walz. Actor: Pickman's Muse. Barret Walz is known for Pickman's Muse (2010), Chicago P.D. (2014) and Chicago Overcoat (2009).
Known For: Pickman's Muse (Robert Pickman), Chicago P.D. (ATF Supervisor Greg HammetEarbuds), Chicago Overcoat (Elliot Walsh), Diversion (Sean Murray)