In case major protesting about this decision ensues, as regards "systemic racism" and not just police abuse, people should have another photo to complete the picture here. This is Police Officer Joseph Mensah:

Also, be aware that the Mayor of Milwaukee is a white Democrat  who was elected Milwaukee's 40th Mayor on April 6, 2004, and has been reelected with over 70% of the vote in 2008, 2012 and 2016.

and the District Attorney is a Democrat in his 4th term who--

[....] Chisholm’s efforts have led to Milwaukee County receiving national praise and attention for innovative approaches to justice and prosecution alternatives. Milwaukee has often served as a model for other district attorneys’ offices throughout the country [....]

and who is up for re-election in November and received 98.9% of the votes in the Democratic primary, unchallenged, the write-ins were only 1.1%

Edit to add some nuance: the officer was with Wauwatosa which is actually a separate city from Milwaukee but one which is a very old suburb and therefore basically a cut out from the City of Milwaukee's geographical lines. The mayor of Wauwatosa is also a white Democrat. General description in most of the country might be that Wauwatosa is part of "greater metro Milwaukee." But in Wisconsin, a lot of governmental jurisdiction is by county, not by city, and both the City of Milwaukee and the City of Wauwatosa are in Milwaukee County. And the district attorney serves the entire county.

sigh, here we go unfortunately:

In this neighborhood about this case, it will be more than counterproductive! How to lose friends and get enemies. This is a relatively liberal and very residential area of mid priced homes, many prized by the owners simply because they are older and not bourgeois. Very small "downtown" if you could even call it that.

like I said, Wauwatosa known to be liberal:

but go ahead, chase all the whites out of town. Because of what a black police officer did.