It wasn’t attempted, it was vehicular assault and reckless driving. Not sure about the definition in AZ though. It was also excessive force when he used the vehicle to ram the trailer and when they intentionally pressed her against the hot tarmac to cause pain or injury.
They will claim qualified immunity, however, in my opinion, a claim of qualified immunity is an affirmative defense in a civil case. Meaning that the individual officer is admitting that they did something, but cannot be held personally liable for it.