Let's handle this one in house, shall we?

It turns out that those who ignored budding signs of the most recent school murderer included not only the local police, who made 39 visits to his home for issues up to and including reckless discharge of a firearm, and not only the FBI, who failed to act on clear signs he was planning a school shooting, but also his school, which (perhaps per an "agreement" with the Obama "Justice" Department) kept investigation of his behavior out of the courts.  Yes, it does turn out that looking past bad behavior generates more of it.