the other carried the Nationalist Party Flag. Historical events (1930 -1950) Río Piedras massacre On October 24, 1935, local police officers confronted and opened fire on supporters of the Puerto Rican Nationalist Party at the University of Puerto Rico. Four Nationalist Party members were killed and one police officer was wounded during the shooting known as the Río Piedras massacre. Isolina Rondón watched from her front door on Calle Brumbaugh, near the University of Puerto Rico, as the police shot into the car carrying the four Nationalists. Rondón testified how she saw the police officers shooting at the victims and how she heard one police officer screaming "Do not to let them escape alive". However, her testimony was ignored and there were no charges raised against the officers. They were instead given a promotion. At the time of the massacre the top-ranking police chief on the island was appointed by the American government—a former U.S. Army Colonel named Elisha Francis Riggs. Since the entire Insular Police took their orders from Riggs the Nationalists considered him responsible for the massacre. On February 23, 1936, Riggs was assassinated by Nationalists Hiram Rosado and Elías Beauchamp, both members of the Cadets, on his way home after attending Mass in San Juan's Cathedral. Rosado and Beauchamp were arrested and executed without a trial at the police headquarters in San Juan but not before Beauchamp posed solemnly for a news photographer with a stiff military salute. Arrest of Albizu Campos On April 3, 1936, a Federal Grand Jury submitted accusations against Pedro Albizu Campos, Juan Antonio Corretjer, Luis F. Velázquez, Clemente Soto Vélez and the following members of the cadets: Erasmo Velázquez, Julio H. Velázquez, Rafael Ortiz Pacheco, Juan Gallardo Santiago, and Pablo Rosado Ortiz. These men all were charged with sedition and other violations of Title 18 of the United States Code. Title 18 of the United States Code is the criminal and penal code of the federal government of the United States. It deals with federal crimes and criminal procedure. By way of evidence, the prosecution referred to the creation, organization and the activities of the cadets, which the government made reference to as the "Liberting Army of Puerto Rico." The government prosecutors alleged that the military tactics which the cadets were being taught, was for the sole purpose of overthrowing the Government of the U.S. A jury of seven Puerto Ricans and