First thing’s first….. David Carradine’s family is convinced the actor was murdered, and have even gone so far as to accuse a secret sect of killer ninjas. A secret sect of kung fu assassins could have silenced actor David Carradine as he delved into their shadowy activities, according to his family’s lawyer. …attorney Mark Geragos suggested that Carradine may have been killed as he tried to uncover groups working in the martial-arts...