Which Kennedy was involved in the Chappaquiddick incident?

(chap-uh-KWID-ik) An automobile accident in 1969 that greatly affected the career of Senator Edward (Ted) Kennedy of Massachusetts. A woman on Kennedy's staff drowned at Chappaquiddick Island, off the Massachusetts coast, after a car that Kennedy had been driving, and in which she had been riding, went off a bridge. Kennedy survived, but delayed informing the police, and has never provided a full explanation of the incident. Afterward, many voters lost confidence in Kennedy, who had been considered a strong possibility to be nominated by the Democratic party for president. 1