Howard noted that Robert came from a famous family, including his father, legendary actor John Carradine, and his brother, 'Kung Fu' and 'Kill Bill' star David Carradine. Robert said he struggled with it as a young actor: "I always downplayed it unless I was trying to get in somewhere." It was hard to grow up in his dad's shadow: "He was in 10 of the greatest films of all time." Regarding David's mysterious death, Robert suspected foul play: "We know for a fact he was murdered because the situation--we found out subsequently he couldn't have gotten into the rig by himself. He needed help. And there were footprints and shit. And the Thai police did not help one bit. You can buy somebody's death for 10 bucks [in Thailand]."