LOS ANGELES—Federal prosecutors have charged four people in connection with the robbery and killing of an off-duty Los Angeles police officer and allege the suspects are tied to a street gang, authorities said Thursday.
Officer Fernando Arroyos, 27, was fatally shot at about 9:15 p.m. Monday in an unincorporated area of south Los Angeles County. The suspects allegedly targeted him because of two silver chains or necklaces around his neck, authorities said.
