I mean, they could. And firefighting planes could be rerigged to disperse chemical weapons, doesn't mean there's anything wrong with them existing.
>Also police helicopters are operated by local/state forces. This is a federal agency which is way out of its jurisdiction.
I'm guessing it's on loan. It's hardly unusual or questionable for the feds to provide assistance to local police during periods of extraordinary crisis. However justified the people of Minneapolis may be in reacting this way to yet another police homicide, what else are the local police supposed to do now except try to restore order using whatever tools are available? Including drones that can provide immediate information about hotspots, crowds, fires, etc.