In 1956 he returned to the Dominican Republic and, after Trujillo's half-brother Nene introduced him to the dictator, quickly rose to power.
In 1958 he became the head of the newly created Servicio de Inteligencia Militar (SIM)[1] and the chief planner of assassinations of the regime's adversaries abroad.
SIM employed thousands of people and was involved in immigration, passports, censorship, supervision of aliens, and undercover work, including foreign operations.
According to journalist Bernard Diedrich, Abbes and his wife had come under suspicion for plotting against Duvalier, but the reasons for his disappearance, and those responsible, remain unknown.
[3] Mario Vargas Llosa's historical novels The Feast of the Goat, about Trujillo's Dominican Republic, and Harsh Times, about Arbenz's Guatemala, devote much space to Abbes.