Child pageant star JonBenét Ramsey’s 1996 death is one of the biggest unsolved murders of the century. Two decades later, her brother, Burke, breaks his silence in an exclusive three-part interview with Dr. Phil starting September 12.

Speaking to the media for the first time, the 29-year-old reveals shocking, never-before-heard details about his sister’s mysterious murder. After 20 years, it’s finally time for answers in one of America’s most-talked about cold cases.

Check here to see where you can watch.

MORE: A Dr. Phil Exclusive: JonBenet Ramsey’s Brother, Burke, Breaks His Silence