It's apparent that López violated the dress code, because his school shared it with graduating students in advance of commencement. And in it, he and his peers were permitted their mortarboards as a visual medium for self-expression.

It took only one school official to prompt his attempt (albeit, unsuccessful) to remove the flag during the ceremony. So what warranted the call for four police to escort him and his parents from the building following a sit-down meeting they voluntarily attended after?

Full post at landturn.com/blog/dress-code-diploma/