JonBenet Ramsey's brother to break his silence nearly 20 years after his sister's death

Burke will reveal "shocking, never-before-heard" details about the case, according to the show.

JonBenet's body was found beaten and strangled in the basement of her parents' Colorado home on December 26 -- the day after she disappeared.

At one point, her parents, John and Patsy Ramsey, had been considered suspects in their daughter's death. They weren't formally cleared of any involvement in the death until 2008.