None of Cameron 's personal records of his involvement with MKUltra survived , since his family destroyed them after his death .
Dr. Cameron died on September 8 , 1967 after suffering a heart attack while he and his son were mountain climbing .
None of Dr. 's personal records of Cameron 's involvement with MKUltra survived , since his family destroyed them after his death .
Dr. Cameron died on September 8 , 1967 after suffering a heart attack while he and his son were mountain climbing .