PHILADELPHIA (CBS) — JonBenét Ramsey’s brother, Burke Ramsey is set to appear on the Dr. Phil show to reveal new details about his sister’s unsolved murder.

Child pageant star, JonBenét was found dead in the basement of her family’s Colorado home in December 1996 when she was just six years old. 2016 marks the 20-year anniversary of the cold case.

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Burke was just nine years old when his sister was found. According to the show’s website, the now 29-year-old, “who has never spoken to the media, breaks his silence” to Dr. Phil during an exclusive three-part interview for the show’s season premiere that will air on Monday, Sept. 12, Tuesday, Sept. 13 and Monday, Sept. 19.