By Julian Pecquet - 11/18/13 07:11 AM EST
One of President Kennedy's nieces on Sunday questioned whether a single gunman shot the former president in Dallas, fueling conspiracy theories as the nation commemorates the 50th anniversary of his death.
“I don't know,” Kathleen Kennedy Townsend repeated three times on "Fox News Sunday" when asked if she believes Lee Harvey Oswald acted alone.
Kennedy's assassination has sparked a cottage industry of books and movies questioning whether he was killed as the result of a conspiracy. While the FBI and President Lyndon Johnson's Warren Commission concluded Oswald acted alone, the 1976 U.S. House Select Committee on Assassinations reached a different conclusion.