Arocena had been collaborating with other Cuban expatriates and exiles and taking part in activities against Castro that included the destruction of many crucial industrial and agricultural locations.
Dissatisfied with the political opposition to Fidel Castro at the time, during the 1970s Arocena began to recruit Cuban veterans from the Bay of Pigs Invasion in 1961.
Pedro Remon took part in most of Omega 7's attacks and had the duty of calling local radio stations after each assassination or bombing.
One narcotics supplier in particular, known as Manuel Fernandez, would offer Arocena and the group large quantities of cash in exchange for their services.
During Eduardo Arocena's trial, he claimed to have been taken to the FBI offices in New York City where he accused the Bureau of drugging him to the point of unconsciousness to which he found needle marks in his arms when he awoke.
When Eduardo Arocena was put on trial he initially denied being the leader of Omega 7, claiming that he was simply "obsessed with Communism" and had worked alongside the C.I.A.
Miriam suggested that the life sentence her husband received was unwarranted given the nature and patriotic reasons of Eduardo Arocena's actions.
Arocena confessed to putting a hit out on Eulalio Jose Negrin who had negotiated with Cuba about the release of political prisoners.
On September 11, 1980, an attaché with the Cuban Permanent Mission to the United Nations, Felix Garcia Rodriguez, was fatally shot.