 Gunfire was exchanged, and the Klan was routed at what became known as the Battle of Hayes Pond.While the Federal Bureau of Investigation (FBI) had paid informants in the Klan, for instance in Birmingham in the early 1960s, its relations with local law enforcement agencies and the Klan were often ambiguous.The head of the FBI, J. Edgar Hoover, appeared more concerned about Communist links to civil rights activists than about controlling Klan excesses against citizens.