EXCLUSIVE: Rex Linn has joined the cast of Devil’s Knot. Linn will play Chief Inspector Gary Gitchell in the Atom Egoyen-directed feature about the wrongfully convicted and wrongly imprisoned West Memphis 3. He joins Colin Firth, Reese Witherspoon Alessandro Nivola and more in the film. The real-life Gitchell, who left the Memphis police force a few months after the three teens’ convictions in an Arkansas triple homicide, was the lead investigator in the 1993 case. Linn played Detective Frank Tripp on CSI: Miami, which CBS cancelled last month after 10 seasons. Linn also appears in Quentin Tarantino’s upcoming Django Unchained. Elizabeth Fowler, Clark Peterson, Richard Saperstein and Christopher Woodrow are producing Devil’s Knot. Molly Conners, Sarah Johnson Redlich, Maria Cestone and Hoyt David Morgan are executive producers alongside WM3 defendants Jessie Misskelley Jr. and Jason Baldwin. Rex Linn is repped by ROAR.