Gov. Luis Fortuño announced Wednesday the appointment of former Puerto Rico National Guard Adjutant Gen. Emilio Díaz Colón to head the island’s 19,000-member Police Department. The announcement was made during a graduation ceremony for hundreds of new state and municipal police officers at the Puerto Rico Coliseum in Hato Rey. The governor thanked Díaz Colón, who took part in the graduation ceremony, for accepting the “challenge” of heading the department. Díaz Colón headed the Puerto Rico National Guard during the Rosselló administration, when troops were posted at public housing projects as part of the so-called “mano dura,” or firm hand,...