Here’s his booking pic (I think):
https://twitchy.com/gregp-3534/2019/03/01/finally-zachary-greenberg-arrested-for-the-assault-of-tpusa-activist-at-uc-berkeley/
https://sanfrancisco.cbslocal.com/2019/03/01/conservative-activist-attack-uc-berkeley-arrest/
Man Arrested In Attack On Conservative Activist At UC Berkeley