SAN FRANCISCO — Hayward's police chief says a 21-year-old has been arrested in the shooting death of a police sergeant killed during a traffic stop.
Chief Diane Urban says Mark Estrada of Oakland is being treated for gunshot wounds and under police guard at an Oakland hospital.
Urban says Estrada has gang ties and that he was taken to Highland Hospital in Oakland by relatives.
It's unclear whether Estrada is represented by a lawyer who could comment on the arrest.
Sgt. Scott Lunger was shot early Wednesday after he stopped a white Chevrolet pickup that was swerving on the road and driving erratically.