In 2004, there were three killings at La Palma, including the inmate Arturo Guzman Loera, brother of drug kingpin Joaquin Guzman Loera (El Chapo Guzman). Arturo's murder occurred less than one week after Federal Preventive Police conducted a surprise operation at the facility, specifically to prevent the smuggling of weapons, drugs, and other prohibited objects into the prison.