First California carriers said, "use a gun to protect yourself from a murderer and your insurance liability is void"! That's for primary residence. Rental liability insurance now states that use any lethal or excessive force and your liability policy won't cover you either.
Now in California a person is not allowed to use non-lethal ammunition such as rubber bullets or pepper slugs.
Then when a spaced out drunk drugged homeless man attacks me at one of my apartment buildings and he lift a baseball bat to strike me, I block it and make the first contact -- I am guilty of assault because I touched him first.
If I call 911 on my cell phone, I may get connected to the police or dispatch in about 9 to 15 minutes with a 3 to 5 hours response time.
And you are worried if a tenant who is supposed to carry medical insurance and renter insurance get's plastered then trips down a couple of steps and then sues you for negligence -- with a blood alcohol lever exceeding dead dunk.... This is what liability insurance is for and a personal umbrella policy.
--47.156.xx.xx