In July 1959, Matos denounced the direction the revolution was taking by giving openly
anti-communist speeches in
Camagüey. This launched a months-long dispute between him and Castro, then
Prime Minister of Cuba. When Castro replaced President
Manuel Urrutia with the more radical
Osvaldo Dorticós Torrado, Matos tendered his resignation in a letter to Castro. On 26 July, Castro and Matos met at the
Hilton Hotel in
Havana, where, according to Matos, Castro told him: "Your resignation is not acceptable at this point. We still have too much work to do. I admit that Raúl [Castro] and Che [Guevara] are flirting with Marxism ... but you have the situation under control ... Forget about resigning ... But if in a while you believe the situation is not changing, you have the right to resign." In September 1959, Matos wrote: "Communist influence in the government has continued to grow. I have to leave power as soon as possible. I have to alert the Cuban people as to what is happening." On 19 October, he sent a second letter of resignation to Castro. Two days later, Castro sent fellow revolutionary
Camilo Cienfuegos to arrest Matos. Matos says that he warned Cienfuegos that his life was in danger, that Castro resented Cienfuegos' popularity and had purposely infuriated and seemed to have hoped that Matos' supporters would kill him rather than allow him to take command from Matos. Cienfuegos listened but relieved Matos of command and arrested Matos and his military adjutants. Cuban Communists later claimed Matos was helping plan a counter-revolution organized by the American
Central Intelligence Agency and other Castro opponents, an operation that became the
Bay of Pigs Invasion.
Sentencing and imprisonment The same day Matos was arrested,
Cuban exile Pedro Luis Díaz Lanz, a former air force chief of staff under Castro, flew from Florida and dropped leaflets into Havana that called for the removal of all Communists from the government. In response, Castro held a rally where he called for the reintroduction of revolutionary tribunals to try Matos and Diaz for treason. According to the
New York Times, when Castro asked the crowd if Matos should be shot, "[a]lmost every hand was raised and the crowd again screamed: 'Firing squad! Firing squad!'". In the view of U.S. Ambassador to Cuba
Philip Bonsal, Castro used Díaz Lanz's action, which he characterized as a "bombing", to create a mass reaction and suppress the issues raised by Matos's resignation. On 13 December,
Raúl Castro testified that Matos was trying to foster disunity by raising "the phantom of communism". Testifying the next day, Fidel Castro delivered a seven-hour speech accusing Matos and the others of campaigning against the revolution and "indirectly" promoting the interests of the United States, large landowners, and supporters of Batista and the dictatorship in the Dominican Republic. The prosecution asked for the death sentence. On 15 December, the court found Matos guilty of counter-revolutionary activity and sentenced him to twenty years in prison. He served the first six and a half years of his sentence at the
Isla de la Juventud prison, where Castro had been imprisoned in 1953, and the remainder in Havana's
La Cabaña Prison. According to Matos: Matos served his full term and was released from prison on 21 October 1979. ==Life after prison==