The brother of JonBenét Ramsey has filed a lawsuit seeking $750 million against CBS Corp., saying the broadcast company produced a fraudulent documentary that slandered him by accusing him of striking and killing his sister with a flashlight in 1996.The program, “The Case of: JonBenét Ramsey,” was released as the 20th anniversary of the 6-year-old beauty queen’s death in Boulder was approaching. It was viewed by more than 10 million people, the lawsuit says.DenverPost