MARTINEZ (CBS SF) — A suspect was arrested in a shooting in El Sobrante last week that left one person dead and a second victim with critical injuries, authorities said Wednesday.

The Contra Costa County Sheriff’s Office said homicide detectives arrested 23-year-old Pierre Jackson of Antioch/Brentwood on Monday. The district attorney’s office has charged Jackson with murder and attempted murder; he is being held at the Martinez Detention Facility in lieu of $3.5 million bail.

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On March 31, sheriff’s deputies were dispatched to the 4500 block of Appian Way in El Sobrante at about 8:41 p.m. on a report of an assault with a deadly weapon. They found two victims with serious gunshot wounds. One of the victims, identified as 25-year-old Pittsburg resident Dejante Kennedy, was pronounced dead; the second victim was taken to a hospital in critical condition.

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There was no word on the second victim’s current condition.

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The investigation is still ongoing and anyone with information about the shooting was asked to contact the sheriff’s office investigation division at (925) 313-2600 or dispatch at (925) 646-2441. Tips can be emailed to tips@so.cccounty.us or left anonymously at (866) 846-3592.