I’ve already answered this question numerous times, even if folks want to pretend that I haven’t.
The rules are the same everywhere in the country that I’m aware of. If there is an imminent threat to the lives of the citizens, such exigent circumstances guide the police.
Watertown had one “alleged” murder running loose.
Chicago and DC have dozens, if not hundreds of murderers running loose, with new ones joining the group each and every day.
Why don’t they get the lockdown/house-to-house-search treatment?