An assistant coach of the girls junior varsity water polo team at Northgate High School in Walnut Creek has been arrested for various sex crimes with a minor that took place in Walnut Creek according to this article in the San Francisco Chronicle.
From the article:
Christopher Yang, 27, of Walnut Creek, an assistant coach on the junior varsity girls water polo team at Northgate High School, is free on bail after being arrested last week by Contra Costa County sheriff’s investigators.