https://www.mercurynews.com/2020/11/09/san-mateo-murder-suicide-investigated-after-shooting-and-standoff/

SAN MATEO – Police were investigating a murder suicide after a care home worker shot a co-worker to death Monday morning, then went home and engaged officers in a stalemate for several hours before fatally shooting himself, authorities said.

The violent sequence began about 7:20 a.m. with a report of a shooting at a care home on the 1700 block of Pierce Street, according to San Mateo police. Responding officers found a 42-year-old man gravely injured with gunshot injuries, and he was pronounced dead.