Courtesy: Lifetime

Lifetime will premiere the Original Movie An Officer and a Murderer, starring Gary Cole (The Good Wife, Office Space, Entourage), Laura Harris (Defying Gravity, A Borrowed Life, 24) and Rossif Sutherland (King, The Con Artist, High Life), on Saturday, July 21, at 8:00pm ET/PT.

The riveting film is based on the true story of a powerful and respected military officer who committed numerous brutal crimes and was eventually brought down by a tenacious small town police detective.

Immediately following the world premiere of the Original Movie, Lifetime will debut the hour-long documentary Beyond the Headlines: An Officer and a Murderer.  Revealing an in-depth look at the shocking 2010 case involving high-ranking Canadian Air Force Officer Colonel Russell Williams, the documentary chronicles the inner workings of the investigation