RODEO -- A 28-year-old man fatally shot Sunday was identified Tuesday as Chadwick Brice of San Pablo, said a spokeswoman for the Contra Costa County Coroner's office.

Investigators with the Contra Costa County Sheriff's office said Brice was shot at an apartment complex on Crestwood Drive in unincorporated San Pablo. Investigators initially reported that the shooting occurred in Rodeo.

Deputies were called to Doctors Medical Center in San Pablo at 3:05 a.m. Sunday after Brice showed up at the emergency room with a gunshot wound to his stomach, police said. He was transferred to John Muir Medical Center in Walnut Creek, where he was pronounced dead at 9:20 a.m. Sunday.

Xavier Hickman, 28, of Benicia was charged Tuesday with one count of murder with a firearm enhancement.

Detectives don't yet have a motive in the slaying but say the two men knew each other. Hickman was booked into the Martinez Jail on several charges, including homicide. His bail was set at $1.3 million.

Anyone with any information on this case is asked to call the Contra Costa County Office of the Sheriff Investigation Division at 925-313-2600. Anonymous tips can be emailed to: tips@so.cccounty.us or called in to 866-846-3592.

Reach David DeBolt at ddebolt@bayareanewsgroup.com. Follow him at Twitter.com/daviddebolt. Reach Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.