School resource officers?

If you, like I, were horrifed* to see video from Spring Valley High in Columbia, South Carolina of a school resource officer knocking a high school girl's chair over as he arrested her for refusing to leave a class, a few things to read:

• in response to "why didn't she just...?" a reminder about adolescent brain development
• an article from earlier this year from the Atlantic "When Schooling Meets Policing"
• a post from the Education Law blog on who should handle discipline

*though unfortunately not surprised. There have been plenty of reports of such things in the past, just not on video.