https://www.mercurynews.com/2023/01/24/half-moon-bay-shooting-search-for-information-on-accused-disgruntled-co-worker/

The man accused of fatally gunning down seven people and wounding an eighth in dual workplace massacres across the popular tourist community of Half Moon Bay threatened to suffocate and use a knife to split open the head of a South Bay restaurant co-worker a decade ago, court records obtained Tuesday by the Bay Area News Group show.

Chunli Zhao, the 66-year-old shooting suspect, made those threats in March 2013 after quitting his restaurant job, according to a civil harassment restraining order his former roommate and co-worker filed in Santa Clara County Superior Court.