Mariano Faget y Diaz was a Cuban secret police commander and counterintelligence officer for over twenty years in the Republic of Cuba.

[1] Faget was the director of the Enemy Activities Investigation Service (SIAE), where he was responsible for hunting Nazis and Abwehr agents in the Republic of Cuba during World War II.

In 1940, with World War II looming, Fulgencio Batista appointed Faget to become the director of the newly created Enemy Activities Investigation Service (SIAE).

"[2] Faget quickly gained a reputation as being a shrewd and intelligent counterintelligence investigator of anyone he suspected of having ties to Nazi Germany (and their fascist allies in the government of Francisco Franco) or the Empire of Japan.

[2] Faget was also the chief Cuban investigator into the case of Abwehr officer Heinz Lüning, who became the only German spy executed in all of Latin America on espionage charges during World War II.

Sometime during Batista's reign, Faget was made a deputy director and second in command of the Cuban Bureau of Investigation (BI).

In 1956, during the Cuban Revolution, Faget became the director of the newly established Bureau for the Repression of Communist Activities (BRAC).

A scientist of the North American school: continuous blows on the head, leaving no marks, but producing tremendous pain and tension.

To my inveterately poor memory was added in those days an almost total unconscious amnesia..."[7] Another Cuban revolutionary who was reportedly tortured under the orders of Faget was Adamilda Verena Alfonso Batista.

That night, Faget took his family and joined Batista's government at the Camp Colombia airfield in Havana, and boarded a C-47 bound for New Orleans.

[11][7] The Department of Justice admitted that Faget was working for them “to keep Castro agents from coming into the United States.”[1] An unnamed official at the DOJ said: “To get this job of screening done properly, we would deal with the devil himself.”[1]