 Like Huber, Berríos probably was seen as knowing too much, as he had been implicated both in the Letelier case and in production of black cocaine and sarin gas for Pinochet.Berríos escaped from Chile in 1992, assisted by a Special Unit of the DINE known as Operación Silencio (Operation Silence).Furthermore, Main Cargo, the firm which worked with Famae to export the weapons, was owned by Marianne Cheyre Stevenson, the sister of Juan Carlos Cheyre.