((WTBH)) - I'm so sorry you and the girls had to go through this. I have to admit, my first thought was exchanging the girls at the police office, too. I KNOW they you don't trust them for good reason, but it would be rather hard for him to beat himself up and blame it on him with cops and cameras around.
Any chance you can take someone with you when you go? Get there and start the video recording on one of your phones, state "this is being video recorded" because I think there's some legality that they have to know they're being recorded.
I don't know. I'm hoping your lawyer can do something. ((HG)) has an excellent idea about checking to see if there was any camera surveillance at the parking lot. When ((SpeedyJason)) got attacked the first time, there were witnesses but the camera surveillance further reinforced that it was unprovoked.
You and the girls are ALWAYS in my prayers, but even moreso tonight.
Love, hugs, and prayers,
Amy