I just watched the most recent episode of [i]Prison Break[/i] and spotted Turk, and he even goes by the name TURK in the show- hehe.
here's the show credits to confirm it:
http://www.tv.com/prison-break/riots-drills-and-the-devil/episode/467819/summary.html

for those too lazy to link out:

Originally aired: Monday September 26, 2005 on FOX

Writer: Nick Santora
Director: Robert Mandel
Guest Stars: Robert Michael Vieau (Troley) , Paul Noble (Eric Diamond) , [color=cyan]John Turk (Green String Inmate - Turk)[/color] , Howie Johnson (Lukasz) , Ora Jones (Wendy) , Michael Cudlitz (C.O. Bob) , Matt DeCaro (C.O. Gary) , Daniel J. Travanti (Unknown) , Stacy Keach (Warden Henry Pope) , John Heard (Governor Frank Tancredi) , Mark Morettini (C.O. Green) , Cedric Young (Sick Boy Con #2) , Daniel Allen Ruben (Sick Boy Con #1) , David McCoy (Adam Diamond) , Anthony Fleming (Kitchen Inmate) , Kwame Amoaku (Stroker) , Brad Fleischer (Pop Pop - Theo) , Blaine Hogan (Seath - Cherry) , Phillip Edward Van Lear (C.O. Cells) , Mac Brandt (C.O. Cells) , Frank Grillo (Nick Sarvinn) , Muse Watson (Charles Westmoreland)

And finally- a screenshot: