Sirhan Bishara Sirhan is a Palestinian-Jordanian man who assassinated U.S. senator Robert F. Kennedy, the younger brother of U.S. president John F. Kennedy and a candidate for the Democratic nomination in the 1968 United States presidential election on June 5, 1968. Sirhan was 24 years old at the time. On April 17, 1969, he was convicted of first-degree murder, among other charges. He was subsequently sentenced to death by gas chamber. In 1972, this was commuted to a life sentence in the aftermath of People v. Anderson. The circumstances surrounding the attack, which took place five years after President Kennedy's assassination, have led to numerous conspiracy theories.