Federal prosecutors filed a criminal complaint on Jan. 13 charging three members and an associate of a Los Angeles street gang with the robbery and fatal shooting of off-duty Los Angeles police officer Fernando Arroyos, 27.

The criminal complaint alleges that two of the defendants confronted Arroyos and his girlfriend in South Los Angeles on the night of Jan. 10, stole items and shot Arroyos, who died. The defendants are Luis Alfredo De La Rosa Rios, 29; Ernesto Cisneros, 22; and Jesse Contreras, 34, all members of the Florencia 13 street gang, as well as Haylee Marie Grisham, 18, who is Rios’ girlfriend.

The complaint charges the four defendants with violent crime in aid of racketeering, whereby the defendants allegedly murdered Arroyos to increase and maintain position within the gang.  The defendants were taken into custody on Jan. 12.

Arroyos was a three-year veteran of the Los Angeles Police Department who was most recently assigned to the Olympic Division.