I know who was behind Bobby Kennedy's murder, by his actor friend Robert Vaughn By ROBERT VAUGHN When Bobby Kennedy's death was announced that day in June 1968, I cried myself to sleep. It was months before I was able to function normally again. I had deeply admired Bobby since I was first introduced to him in 1960. Ironically, we met at the Ambassador Hotel in Los Angeles where, eight years later, he would be assassinated. We ran into each other again at the University of Southern California in 1965, when I was concluding work on my PhD in communications...