The lone gunman theory or one-gunman theory is the nickname given to the conclusion reached by the Warren Commission that U.S. President John F. Kennedy was assassinated by a single gunman named Lee Harvey Oswald. The Commission report stated that Oswald was a disturbed man, whose radical political views and depression had led him to shoot the President.
In the late 1970s, the House Select Committee on Assassinations concluded on the basis of controversial acoustic evidence and an investigation into Oswald's and Ruby's alleged connections, that President Kennedy was "most likely killed as the result of a conspiracy". This conclusion is controversial.
See also