Initially, Mohammed Noor was given a free pass for shooting Justine Damond. Same department.
The most famous incident off the top of my head, the LAPD officers who almost killed two innocent ladies delivering newspapers when they were looking for Christopher Dorner. Over 100 rounds fired at a truck... that was the wrong brand, wrong color, wrong number of occupants, wrong gender occupants - nope, just open fire and blaze away. No charges, no disciplinary actions, nothing.
https://www.nydailynews.com/news/national/no-charges-8-lapd-shot-innocents-manhunt-article-1.2511683
Seems to me, from the videos I have seen, the police are lined up in a formation to protect the police building behind them, while ignoring the looting and destruction occurring just across the street in the retail stores. Given the volatile situation and the left leaning politics of Minneapolis, they might be under orders to do exactly that.