SPD routinely started firing into crowds prior to making any such announcements, including the first time I was hit. The second time, they announced it and then immediately started firing at the crowd.

Announcing an unlawful assembly is not carte blanche to dole out collective punishment or violence, either.

There's already lawsuits ongoing. They won't go anywhere in terms of reforms because individual cops are virtually always indemnified, difficult to identify in these situations (many covered their badge numbers and nametags with tape), and the city will absorb the cost without the department taking any real hits.