Cerro Maravilla, one of the highest peaks in Puerto Rico, is perhaps best known for being the site of a police ambush in 1978 in which two pro-independence activists were killed. Though initial inquiries by local authorities, the US Justice Department, and the FBI concluded that there was no wrongdoing on the part of the police, subsequent investigations resulted in four second-degree murder convictions. How many Puerto Rican Secretaries of Justice resigned following the incident? Discuss