The Supreme Court has ruled twice that cops are not responsible for protecting you. As horrific as it was watching them Stand By and coward as kids were murdered, they aren't legally required to go in and stop it. Morally I think they're obligated to, but not legally. Which is yet another reason an unrestricted Second Amendment is so important: your safety is your responsibility and as such you should be able to select the tool most suitable to your needs, to carry it, and employ it to save life when necessary. Whether that's a teacher who concealed carries in a class or a janitor who concealed carries while on the job at a school or a person who keeps body armor and an AR-15 in the car to respond to a mass shooting at the office and fight back. Your safety is your responsibility. Stripping you of the tools and ability to protect yourself and your loved ones and forcing you to depend on people who have no legal duty to protect any of you is both criminal and Evil.