Yes, but the problem in this case is that the housing developer used one master key for all of the houses in the neighborhood. And now he is being asked to giv

Yes, but the problem in this case is that the housing developer used one master key for all of the houses in the neighborhood. And now he is being asked to give over the master key to the police, so that they can search the house. Will they copy it? Who knows... this is a question related to how much you trust the government and all of it's actors, policies, and procedures. Or you can just not have master keys for all of the houses you build, or buy houses with unchangeable master keys.