Sounds like the APD handled this like the 911 call that it probably was. Even in the USA, there have been Court decisions that when a 911 call comes in, the Police are OBLIGATED, by common law, to check out the circumstances fully, including being granted the RIGHT, and again obligation, to search the interior of the house to ensure that the identified owner WAS the only occupant, and was not under duress from a suspect, or several such suspects, to go outside and dissuade the investigators from continuing their lawful duty, and thus possibly allowing her/him/them to avoid detection and capture.
Yes, the situation was frightening, and it did bend the rules of security of domicile, but it was for Vizzini's, and the neighbours', safety, along with that of the responding officers', to check this out.
Even if Vizzini had spoken to 1 or more of the APD officers long before this situation, and demonstrated his flashaholishm, who is to say that those officers would have been on duty that night? My Force in general, and I particularly, is anal about filing reports for future information, but I doubt highly that those officers would document such contact, and even I would not submit such a report. I am sure that, if such a situation occurred around here, that even we would respond in a similar manner.
I understand the sanctity of the home, and the cherished provisions of your Bill of Rights, and respect the American people for such codification of such a basic, unalienable and necessary protection, which should NOT HAVE TO BE so enshrined, and just expected of all righteous and honest persons towards one another.
I actually pains me, however, to read the posts, whether in jest or not, where people mistrust their Peace Officers to the point of even suggesting that the officers in this incident might consider violating their oath of service and pilfer or cause damage to the property of, and/or harm a citizen. However, your opinions are yours, and may be the result of actual experience with your local authorities, or told to you by credible sources that have been subjected to such experiences, and no one can thus deny you from feeling that way, nor from expressing those points of view.
Just my .9 of .02 of your $.