https://www.pubfacts.com/author/Michael+Hornsby
It appears he is a STUDENT at Berkeley, so it looks like they are COVERING this up, we used to call this:
Obstruction of Justice
Conspiracy after the fact to commit Aggravated Assault and Mayhem
The perp is Zachary Greenberg
https://sanfrancisco.cbslocal.com/2019/03/01/conservative-activist-attack-uc-berkeley-arrest/