Unfortunately, 6 minutes would not have been enough time to prevent the mass shooting. It might have helped to interrupt/shorten the shooting spree IF police were able to get up the and IF the police were intent on stopping the shooting. Remember, the first on the scene would have been beat/patrol officers and NOT the SWAT team or equipped/trained to storm a barricaded room. Also, I was under the impression that many high end casinos have armed security guards on premise. If so, why didn't any of them respond?