https://www.mercurynews.com/2019/08/11/analysis-impact-of-key-california-gun-laws/

California has the strictest gun regulations in the country, but it also has had more mass shootings than any other state in recent years, from killings in Santa Barbara and San Bernardino to Tehama County and now Gilroy.

In some cases, shooters have circumvented the state’s gun laws, even when the legislation has functioned as intended. In other cases, the laws may have disarmed people who otherwise would have gone on to commit mayhem.