Minneapolis police tapped Google to identify George Floyd protesters

They searched for the arsonist by geofencing everyone in the area, and requesting identifying information of each of them.

Also:

> The affidavit also links the suspect to a white supremacist group called the Aryan Cowboys, and to an incident weeks later where a Muslim woman was harassed.

While the arsonist's politics are probably irrelevant, the police think they know them.

Then we should also add "... and police accused anyone within the geographical region of the protests of being one of those vandals using violence ..." (which, because of how GPS works, is going to be X meter from the point where a crime was committed. Where X cannot be less than ~200m)

The problem people have here is that these search warrants are not specific enough (for one thing, those are houses, people LIVE THERE) to stand by themselves, and people generally don't trust police or prosecutors to not use them as evidence.