A four-hour retrospective on the unsolved 20-year-old slaying of 6-year-old Colorado beauty princess JonBenet Ramsey is the basis of a $750 million defamation suit filed Wednesday against CBS by the victim’s surviving brother.

Atlanta libel lawyer Lin Wood sued the television network on behalf of Burke Ramsey, who was 9 years old when his sister was killed and who, according to the suit, has been “publicly and unequivocally cleared” multiple times by law enforcement authorities and two prosecutors of any role in JonBenet’s death.