I've never heard of anyone being arrested for peaceful protests, not since Martin Luther King at least. I'm not saying it doesn't happen ever (your case might be a good example), but peaceful protests virtually never led to arrests.
i know from experience and talking directly with the arresting officers, and my assigned defense attorney, and the judge that dropped mine and a number of other identical charges in the room
> A protester at the NC General Assembly invites her arresting officer to Christmas dinner. She was one of several arrested while protesting a power grab by Republican legislators during a surprise special session.
http://www.newsobserver.com/news/politics-government/state-p...
https://www.google.com/search?&q=non+violent+protestors+arre...
https://www.theguardian.com/us-news/2016/sep/12/amy-goodman-...
Cops arrest and assault people engaging in peaceful, legal, constitutionally protected protest all the fucking time.