http://www.nydailynews.com/news/national/dad-arrested-pick-kids-school-article-1.1523389

Here is the official news story on the situation. The school specifically changed their policy to prevent parents from doing what Howe (the guy in the video) is doing. Howe was notified that he could not pick his kids up in this manner unless a waiver was signed for them to walk home. This is an issue of both school liability and student safety. While I think the cop was a retard and completely failed to handle and de-escalate the situation, he did act as he should (arresting the man when he made it clear he wouldn't follow the school guidelines) given the situation.

fuzzyundies said:

A little background: the Concord Blue Devils is a Drum and Bugle Corps, which is like a marching band for athletes and masochists. They do field show competitions like the halftime marching band shows you've seen at football games, but unlike school marching bands, they have (usually) 64 horns, 24 drums, 24 color guard and an almost militaristic training regimen. They rehearse weekly throughout the year and then train and compete on the road all summer, 7 days a week, 12 hours a day, split between strength, calisthenics, music and marching. That's how they build their discipline and cohesion. I marched with their main competitor in the late 90s.