John Walsh is back on ID, and he needs your help more than ever. All new season of In Pursuit with John Walsh, Wednesday at 10/9c. | Investigation Discovery

What compeled a teenager to aid one of America’s most sadistic serial killers? For the first time in half a century, Elmer Wayne Henley Jr. breaks his silence. "The Serial Killer’s Apprentice" unravels his disturbing alliance with Dean Corll—better known as the Candyman Killer. Watch on ID or stream on HBO Max on September 17. | Investigation Discovery

High school football unites communities, but what happens when murder shatters that Friday night dream? Watch "Murder Under The Friday Night Lights" Tuesdays at 10/9c starting January 4th on ID. | Investigation Discovery