https://www.mercurynews.com/2021/12/31/concord-sunvalley-mall-on-lockdown-after-reports-of-shooting/

CONCORD —Police are investigating reports of a shooting at Sunvalley Shopping Center, according to authorities.

Donna Piper, a Martinez resident, said she was at the mall to exchange a few Christmas presents when she heard gunfire ring out at around 3:20 p.m. on the first floor of the shopping center near the food court.