The circumstances surrounding the assassination of the US President John F. Kennedy on November 22, 1963, spawned a host of a conspiracy theories. These suspicions were mitigated somewhat when an official investigation by the Warren Commission concluded the following year that there was no conspiracy. Since then, doubts have arisen regarding the Commission’s controversial finding that only Lee Harvey Oswald was responsible for the assassination of Kennedy, and many Americans believe that others besides Oswald were also involved in the assassination. Critics have argued that the Commission and the government have covered up crucial information pointing to a conspiracy although subsequent official investigations confirmed most of the conclusions of the Warren Commission. However, the United States House Select Committee on Assassinations (HSCA) concluded in 1979 that Kennedy was probably assassinated as the result of a conspiracy, with: “…a high probability that two gunmen fired at [the] President”. No person or organisation was identified by the HSCA as having been a co-conspirator of Oswald. The acoustical evidence that the HSCA partly based its conspiracy conclusion on has since been discredited. Most current theories put forth a criminal conspiracy involving parties as varied as the CIA, the Mafia, anti-Castro Cuban exile groups, the military industrial complex, sitting Vice President Lyndon B. Johnson, Cuban President Fidel Castro, FBI director J. Edgar Hoover, the KGB, or some combination of those entities. Liam McCann’s painstaking book investigates and analyses all the pertinent conspiracy theories to decide once and for all if Oswald was involved, whether he was a lone gunman, or if there were other assassins in Dealey Plaza on that fateful day in November 1963.