‘The gunman behind the worst mass shooting in Texas history escaped from a psychiatric hospital while he was in the Air Force, and was caught a few miles away by the local police, who were told that he had made death threats against his superiors and tried to smuggle weapons onto his base, a 2012 police report showed.
That episode, which came to light on Tuesday, was another in a series of red flags about the threat the gunman, Devin P. Kelley, posed to those around him. But none of the warnings stopped Mr. Kelley from legally purchasing several firearms, including the rifle he used to kill 26 people at the First Baptist Church of Sutherland Springs on Sunday…’
via New York Times
But this is not an anomaly! I work in a psychiatric hospital and it is not the exception but the rule that there is no mechanism through which the fact of someone’s admission, or the determination that they are dangerous, is conveyed to any authority who might flag them if they later attempted to purchase a firearm!