Following the assassination of President John F. Kennedy in 1963, the warren commission was setup to investigate the case. The team came to a conclusion that the assassination was carried out by a lone gunman. However, the house select committee on assassinations carried out fresh investigations in the period between 1976 and 1979 concluding that the assassination was a conspiracy, essentially denouncing the earlier findings that suggested a one man effort. The conspiracy theories developed in the latter years implicated a number of public figures including former Cuban leader Fidel Castro, the mafia, the FBI, Lyndon Johnson, the CIA amongst many others. These groups and individuals were named in several conspiracy theories namely, the organized crime theory, the secret service, the federal reserve conspiracy and the new Orleans conspiracy among others. From personal opinion, the theory that seems to hold most water in this particular case is the organized crime conspiracy which basically implicates the mafia, Cuban exiles and Fidel Castro’s supporters. Mob involvement has been well presented in David Kaiser’s book, The road to Dallas . When President John F. Kennedy took over office from Dwight Eisenhower, he made it a point to ensure that criminals were incarcerated in numbers that were unprecedented (Kaiser, 11). Under his watch the number of persecutions increased by upto 12 times the number recorded during his predecessor’s tenure. Members of mafia formed a big number of the criminals he had sent to jail and this gave them a reason to retaliate. The Mafioso considered Fidel Castro their biggest enemy and most of them built strong relationships with anti-Castro Cubans. Some of the documents that were allegedly not consulted by the Warren commission indicate that some of the Mafiosi had been involved in plotting conspiracies directed at assassinating Fidel Castro. The Mafia felt short changed when President Kennedy failed to support their efforts in the invasion. The mafia in this cause was under the support of Cuban exiles in the USA who wanted to go back to Cuba and carry out an invasion Castro’s communist government (Kaiser, 123). It has also been suggested that anti-Castro Cubans were angered by Kennedy’s failure to destroy Cuba during the 1962 missile crisis. Giving the mafia and the Cuban exiles even more reason to hate him, President Kennedy had been at the forefront of leading charges against organized crime as a young and idealistic lawyer. Further, the president’s younger brother Bobby also followed in his footsteps leading the administration in protests against the mafia. The mafia had helped John F. Kennedy win the elections and therefore they felt betrayed when he started prosecuting them when he got the office. The polls ended in dispute with allegations of the elections being marred with irregularities. Investigations that were carried out by to the CIA revealed that Carlos Marcello, a suspected member of the mafia could have organized and implemented the conspiracy. The investigations also realized that Marcello had the motive, the opportunity and the resources necessary to carry out the assassination. The most popular organized crime conspiracy involving the Cubans suggests that Kennedy could ha