The man suspected of killing a Pomona SWAT officer who was serving a search warrant Tuesday has been charged with capital murder, according to the Los Angeles County District Attorney's Office.

David Martinez, 36, a suspected Mongols motorcycle gang member, was scheduled to be arraigned Thursday, and prosecutors planned to request that he be held without bail, according to a statement from the DA's office.

Pomona Police Officer Shaun Diamond, a 15-year law enforcement veteran, was shot in San Gabriel during what the officials have called a multi-agency operation targeting the motorcycle gang.

Diamond was pronounced dead early Wednesday. Law enforcement officers formed a procession to transport his body to the coroner's office.

Prosecutors will decide later whether to pursue the death penalty, the DA's office said.