VIDEO: High school valedictorian has mic cut off mid-speech. What happened to free speech?!

I can't believe this happened in my home town!! Amazing how easily people shut down free speech these days. Let me know what you think about this below.

https://www.washingtonpost.com/news/education/wp/2017/06/20/a-valedictorian-went-rogue-in-his-final-speech-his-school-tried-to-shut-him-down/?utm_term=.55868ed95ac8