More police overreaction?

[jumpy]

http://news.bbc.co.uk/1/hi/world/americas/7917295.stm

Don't know the ins and outs of this, but at face value it sure looks like an assault on a minor in police custody to me.
Kicking off the shoes into the corridor appears to provoke a brutal response. Both of those guys must weigh at least twice as much as that girl.
It bears a striking resemblance to the cctv footage I see of yobbos fighting in the streets on a friday or saturday night. No restraint at all.
I'm sure if there was more to the incident, should it have taken place in the station, there will be plenty of video evidence of the girl causing trouble for the deputy, corroborating his story that he acted to prevent her from attacking him...

I'll bet the deputy doesn't want the film aired to the public... prejudice the right to a fair trial? Pfft How about the right to be a minor and not to be assaulted whilst in police custody, no matter if there's a 'tantrum' brewing, that guy had clearly lost control of the situation given his response.
He could have just closed the door, could he not? Thereby avoiding the need for physical contact?