It was nothing more than a successful suicide that could have been prevented before she ever walked into the station. Two previous attempts and a history of mental illness, the ball was dropped long before she picked up that knife. This dropping of the ball is just a repeat of the sad state our help for the mentally ill is in. Sandy Hook, Arizona, Colorado are examples of that same ball dropping.
Sure, it’s broken.
Heck I could disarmed her and I’m a fat Ole guy. Three big strong highly trained donut munchers wouldn’t even have to put their coffee down.