. >> garry cornwell was deputy chief council on assassinations. he reopened kennedy's case in 1967 to see if there was a conspiracy. >> that memo that he wrote to bill moyers who were president johnson's white house assistant, they wanted a blue ribbon panel of highly respected people to convince the american public that lee harvey oswald was the sole asass seven. 50 years later, ypeople still have doubts about the investigation. >> because it wasn't a clear investigation, and i have some unanswered questions, but there's no doubt that oswald killed him. he was such a crazy guy that he could have confederates that were helping him in some way. >> did the fbi, did they drop the ball in their tagging of oswald? >> the fbi was watching oz waltd, but they never really took him seriously as a threat. >> the fbi came out and left his card and visited and came out a second time as well. i gave the card to oswald when he came out on the weekend. my feeling was, sure the fbi is going to want to know where he is. he's been in the soviet yu unio he's been ba