just how did the whole gun siezure thing during katrina go down
If the police or National Guard saw a firearm, they confiscated it. As they were going door-to-door doing searches for survivors or victims, if they found a firearm in a building, it was seized. If a person was carrying a firearm and it was seen, it was seized.
My impression is that the Superintendent of Police decided in the heat of the moment that he didn't want anyone but police and Guard armed, and the mayor backed him up.