Robert Zavala Carrillo and Mark Gil were arrested in a parking lot on Wednesday evening.

Robert Zavala Carrillo and Mark Gil were arrested in a parking lot on Wednesday evening. Carrillo and Gil are two of 20 people charged in three federal complaints that were unsealed earlier Wednesday. Investigators say Carrillo is the leader of East Side Riva, one of two violent criminal street gangs that were engaged in what authorities called a deadly race war. The East Side Riva is allegedly controlled by the Mexican Mafia and targeted another gang with mostly black members. Prosecutors say Gil is Carrillo's second-in-command.