Watch Sadisflix. J.P. McCarthy was an icon of Detroit broadcasting who ruled the radio waves in the Motor City for thirty years. His story is the ultimate local-kid-done-good tale. Working extensively with the McCarthy family and conducting over twenty interviews with J.P.’s friends, family, co-workers and contemporaries, Detroit Public Television memorializes someone who was considered more of a family member than a voice on the radio to anyone who tuned in to hear his morning show or the Focus program over the years.