The training for Denver Sheriff Department deputies on how to deal with inmates in crisis is nerve-wracking. Actors wearing jail uniforms scream in hysterics, flail and even stuff wads of tissue up their noses to simulate real life inside a detention center. During a recent training exercise, Denver Sheriff Department Deputy Tim Moore kept his voice low as he coaxed and pleaded with an actor pretending to have an imaginary friend named “Roger” in his cell.