I wonder about the doctor. What would cause him to act as he did? Does he have a history of resisting authority? Was he on drugs or drunk? Does he not understand English well? Did he in fact have at least one patient with an extremely serious conditions he needed to care for? Is he under financial stress and needed real money from billings (not vouchers)? Does he have psychological issues that made him act as he did?
Did the passenger just try and explain and the attendant said to her/himself, I don’t get paid enough to deal with this, just walk away and call the cops, let them deal with it. The next thing the passenger knew he was being thrown out of his seat onto the ground by thugs. That sounds so much more likely to me.
A department spokesman has already said they don't support their actions and one is on leave - paid, of course.
These guys will be lucky if they're not brought up on criminal charges. I'd be lawyering up. Bigly.