SAN FRANCISCO (AP) — A California police officer has been convicted of assault with a firearm in the 2018 fatal shooting of an unarmed mentally ill man in a wealthy San Francisco suburb.

A jury in Contra Costa County agreed Tuesday that Officer Andrew Hall was guilty of the charge in the death of Laudemer Arboleda. The jury deadlocked on a second count of voluntary manslaughter.

Prosecutors had argued Hall used “excessive, unreasonable and unnecessary” force when he shot Arboleda nine times as he drove away from police during a slow-speed chase.

Hall’s lawyers said the officer feared for his safety and asked the jury to sympathize with the officer’s need to make split-second decisions.

“Today’s guilty verdict holds accountable defendant Andrew Hall for his excessive use of force in the fatal shooting of Laudemer Arboleda. Deputy Hall’s actions were not only a crime, but they tarnished the badge and they harmed the reputation of all the good, hard working police officers that work for our community. My Office extends our condolences to the family of Mr. Arboleda. With regards to the voluntary manslaughter count, we will take the matter under review to determine the appropriate next steps.”

Contra Costa County District Attorney Diana Becton