Well this seems like an impartial witness
Donald Williams II with the Original Black Panthers of Milwaukee on May 25th, 2020 in MN. https://twitter.com/Austin_Zone/status/1376647520345063426

Source:

Oh look, Donald Williams II is a member of the black supremacist group The Original Black Panthers of Milwaukee who like to go around playing community police against 'racists.'
https://archive.is/oOPoL 

Reminder of what activities the Original Black Panthers of Milwaukee like to partake in. Seems kind of extortion-y to me.

Another example a recent incident with The Original Black Panthers of Milwaukee extorting an Asian nail salon for perceived slights against the black community. Posted January 17, 2021 (Jade's Nails, Milwaukee)

Source (this should be bigger news, sure seems like they were targeting Asians, #stopAsianhate ): https://www.facebook.com/darryl.farmerii/videos/444960096545623

Anyways, back to Donald...seems very impartial indeed.

For those saying he's not the same guy rioting in the video:

Forgot video from on first post.
Donald Williams II in Milwaukee on May 25th last year. Seems stable.

Pardon, I can't read or write sometimes - Williams is with the Original Black Panthers of Milwaukee in the above video but it's Minneapolis

https://gab.com/kittylists/posts/105653085798496089

Donald Williams now has a "Trauma fund" set up on GoFundMe and has raised $15,000 - essentially for his testimony in the Chauvin trial.
Black Panther King Darryl Rick Farmer II is promoting this campaign for his "general"
https://www.gofundme.com/f/official-trauma-healing-fund-for-donald-williams
https://archive.is/ln9Bs 

Comments from the GoFundMe:

this must be the commercial for his GoFundMe

By any means necessary