It's not at all unfathomable how he hasn't been fired. We live in a world where people routinely stage shit to appear as victims for all sorts of reasons. Not just scorned lovers, but internet famous twats, actors and athletes. Being arrested and words on a piece of paper are hardly irrefutable evidence of anything. People get arrested for bullshit all the time and the arrest report I read has a bunch of vague terms that don't preclude this from being staged/set up/self inflicted.
I posted up thread but what are the chances someone commits, and gets caught in the act, their first DV at age 49? Seems pretty fucking low to me. Woman beating seems like a trait that comes out early. Possible? Sure. But how much more likely is it than this chick flipped out on him, called the cops, got him arrested for BS? All of the injuries listed on the arrest affidavit could trivially be self inflicted. Hard to fake a bite on the neck or ass. Arm though? Come on. Scratches, bruises, cuts? I routinely have scratches, bruises and cuts from just living my life.
If he did this? Fire his ass, absolutely. But it's not at all clear to me he is guilty based on what has been made public. FWIW, I have a BSC ex-wife who called the cops on me twice during our divorce for completely made up bullshit.