For people who don't know, ALL DV arrests in CA are felonies..... and the officer is required to arrest even if there is no evidence of abuse whatsoever if the"victim" alleges he or she was shoved or hit. And all DV arrests are no bail until the accused is brought before a judge. That DOESN'T mean anybody actually was abused. It is up to the DA to file charges based on the evidence. So the fact that MacDonald was arrested for felony DV doesn't really mean anything until we know what the injuries were (if any). More than half of the DV arrests in CA are dismissed out of hand once the DA reviews the case.... and he must make that decision within 48 hours.
So this has a better than 50% chance of turning out to be nothing statistically. It is EXTREMELY common, for example, for people to argue, and have one allege the other hit or shoved them just to get them arrested, whether they actually did or not. I've even had women pull their own hair out to present it as evidence of abuse to get an arrest (and had the daughter tell me she saw mom do it). I was a cop in CA for 25 years, and made thousands of these arrests.
In Minnesota it's even worse. The cops there arrest if a 'victim' claims he or she thinks it is possible that their partner could hit them at some point in the future without even an allegation that a actual battery occurred.
You REALLY have to wait for the evidence.