CCW is the only option, and they were holding this guy hostage by not issuing one when it was obviously necessary and appropriate.
[1] - https://www.shouselaw.com/ca/faqs/can-i-openly-carry-a-gun-i...
Here's a decent summary from Gabby Giffords mentioning the right to carry at home and at work (requires permission of business owner but NOT necessarily landlord): https://giffords.org/lawcenter/state-laws/location-restricti...
If you wanna go straight to the source, section 26035 of the CA Penal Code is a good start:
"Nothing in Section 25850 shall prevent any person engaged in any lawful business... or any officer, employee, or agent authorized by that person for lawful purposes connected with that business, from having a loaded firearm within the person’s place of business"
25525 PC is also relevant as it reiterates the home & business exemption to concealed carry laws
Yes, sometimes you can lawfully open or concealed carry on your own property without needing a permit. But if it's open to the public, you need a permit.
http://wiki.calgunsfoundation.org/index.php?title=Unlicensed...