Эта информация тем интересней, что в левой "агиографии" Че этот период либо упоминается вскользь, либо вовсе опускается.
...Однако настоящая власть – в руках Фиделя и Че: за полгода, прошедшие после революции, они в гаванской тюрьме Кабана и в Санта-Кларе без суда и следствия расстреливают около 600 батистовцев – в роли самозваного судьи и прокурора выступает Че Гевара.
"The Killing Machine", Alvaro Vargas Llosa:
But the “cold-blooded killing machine” did not show the full extent of his rigor until, immediately after the collapse of the Batista regime, Castro put him in charge of La Cabaña prison. (Castro had a clinically good eye for picking the right person to guard the revolution against infection.) San Carlos de La Cabaña was a stone fortress used to defend Havana against English pirates in the eighteenth century; later it became a military barracks. In a manner chillingly reminiscent of Lavrenti Beria, Guevara presided during the first half of 1959 over one of the darkest periods of the revolution.
"Fidel's Executioner", Humberto Fontova:
Under Che, Havana's La Cabana fortress was converted into Cuba's Lubianka. He was a true Chekist: "Always interrogate your prisoners at night," Che commanded his prosecutorial goons, "a man is easier to cow at night, his mental resistance is always lower."
Ну и обширный кусок из английской Википедии:
In the months after the success of the revolution, Guevara was assigned the role of "supreme prosecutor", overseeing the trials and executions of hundreds of suspected war criminals from the previous regime.
He was appointed commander of the La Cabaña Fortress prison, and during his five-month tenure in that post (January 2 through June 12, 1959), he oversaw the trial and execution of many people, among whom were former Batista regime officials and members of the "Bureau for the Repression of Communist Activities" (a unit of the secret police known by its Spanish acronym BRAC). José Vilasuso, an attorney who worked under Guevara at La Cabaña preparing indictments, said that these were lawless proceedings where "the facts were judged without any consideration to general juridical principles" and the findings were pre-determined by Guevara. It is estimated that between 156 and 550 people were executed on Guevara's extra-judicial orders during this time.