For the Record (1)

The FBI said its own scientific review found "invalid" a conclusion by the House assassination committee that a second gunman was probably involved in the slaying of President John F. Kennedy. The bureau based its conclusion on a laboratory review of a tape recording from a police motorcycle transmitter, from which private acoustical experts concluded four shots, not three, were fired. The House committee concluded -- based on the recording -- that there was a "95 percent probability" a second gunman joined Lee Harvey Oswald in an assassination conspiracy.