Two ex-girlfriends of the Sheriff have come forward on record relating incidents of similar violent assaults on them. Both dumped Mirkarimi on the spot as they saw him as a serious danger.
The current broad is a Marxist social(ist) climber from Venezuela and expected to step into the leftist American social ruling elite group with her marriage to the American Marxist. This won't work out so well for her if Mirakrimi goes down, the SF Communists will never forgive her, and will destroy her. Same result if she divorces him, she's screwed.
The tactic she intended to control him only works in secret, when the neighbor snitched (with Evidence) on the both of 'em, everything went out of control, and we (and everybody else) got to see Marxist Rats as they really are. Ain't it grand.
Ex-girlfriend #2 was beaten when she discovered Mirkarimi knocked up the Venezuelan down south while dating her, and confronted him about it.
Remember, this is San Francisco, it's not like the real world.
Crazy-world out there. You have described two totally messed up people.