I just want to remind readers that I’ve argued before that putting police officers into schools is a bad idea. It’s an enormous expense for taxpayers that leads to trouble: bored officers hitting on students and hassling kids for minor offenses. As for their value as a deterrent for school shooters, a School Resource Officer (SRO) might as well wear a shoot-me-first vest. (We ran a sim that proved that a shooter can take out a SRO even when he knows it’s coming.) It’s far better to train and arm teachers, on any level you can name. Regardless of what led up to this confrontation, has this incident proved my point?