Mark Rolston (born December 7, 1956) is an American actor. He portrayed Erickson in Saw V and Saw VI.
He played PFC M. Drake in Aliens (1986), Hans in Lethal Weapon 2 (1989), Stef in RoboCop 2 (1990), Bogs Diamond in The Shawshank Redemption (1994), J. Scar in Eraser (1996), Chief Dennis Wilson in Daylight (1996), Wayne Bryce in Hard Rain (1998) and Special Agent in Charge Warren Russ in Rush Hour (1998) (in which he co-starred with future Saw actor Ken Leung). Rolston also acted in Martin Scorsese's 2006 film The Departed and the television horror film Backwoods. Many of Rolston's screen roles are villains due to his trademark icy stare. He also co-starred in 2008's Saw V and 2009's Saw VI.
In 1994, he portrayed convicted killer "Karl Mueller" in the Babylon 5 episode "The Quality of Mercy," as well as "Richard Odin," leader of a vegetarian cult in an episode of the "X-Files" called "Red Museum."
He also appeared in a minor role in The CW series Supernatural in season 4 as the demon Alastair.
He had a voice-acting role in the video games Blade Runner (1997) and Turok (2008). He had also voiced characters in DCAU animated series such as The New Batman Adventures, Batman Beyond and Justice League (which fellow Saw actors Cary Elwes, Scott Patterson and George Newbern were a part of). He also appeared in Criminal Minds in the episode, Blood Hungry as Sheriff Don Hall who asks for the BAU's help in finding out who's behind a series of violent murders.