The older brother of murdered beauty queen JonBenet Ramsey is suing production company CBS and others over a TV series that painted him as his sister’s killer.
Burkey Ramsay has filed a $US570 million ($A1.0 billion) suit, claiming the six-part series has permanently ruined his reputation.
The series aired in September, ahead of the 20th anniversary of the six-year-old’s death.
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Ramsay was found dead in the basement of her family’s Colorado home on Boxing day of 1996.
CBS have declined to comment on the lawsuit.
Burkey Ramsay also previously filed a lawsuit against a pathologist who said he bludgeoned his sister to death.