Hi Mas.... Been a while since I've asked a question here. Ignoring the typical media mistakes (or possibly intentional sensationalism) I would like to share this article: http://www.9news.com/news/article/261931/339/Robbers-use-guns-duct-tape-to-capture-family Of course the report says "Machine guns", but with no rounds fired, we all know it could have been an AR in lieu of an M4. And we of course know that opening the door, even to the non-threatening-appearing female partner of these thugs was a big mistake. But it is notable that during the entry two co-conspirators broke in a rear window. But the part that caught my attention was the thugs yelling "Police, police" on their way in the door. I know that for me window breaches and forcible front door breaches yelling police, police, would certainly take me off-guard. We obviously know the stories of police mix-ups, etc, and that is not at question here. My question is: How does one properly distinguish police in a home entering scenario from a bad guy(s). Should one try to stay barred up and call the operator? Look for the flashing lights outside? Look for the uniform? In this specific iteration of the infinite "what if" continuum, what is the best way to determine threat from ally? Thanks Mas!