On October 16, 1960, Castro ordered Morgan's arrest due to counterrevolutionary activities. Three days later, Morgan was arrested while attending a meeting for the National Institute for Agrarian Reform, to which he had been summoned. Morgan was formally charged with plotting to join and lead the counter-revolutionaries who were active in the Escambray Mountains. On March 11, 1961, shortly after a military trial at La Cabaña fortress, Morgan, then 32 years old, was shot by firing squad with Fidel and Raul Castro in attendance. One month later, 1,500 CIA trained counterrevolutionaries unsuccessfully invaded Cuba at the Bay of Pigs resulting in Castro officially declaring the Revolution a Socialist endeavor.