Yes, I have. As I understand it they have a maximum range of a little over ten metres, which is a good deal less than the lethal range of a handgun and utterly pathetic compared to the lethal range of a long rifle, so I can understand why they won't necessarily be the weapon of choice for police dealing with a potentially firearm-carrying suspect.
I'm not saying this sort of incident is acceptable, because it boils down to the suggestion that shooting people with dementia just in case is acceptable; clearly it isn't. But in a society so determined that its citizens should have the freedom to go armed, I can't see a solution. The solution in most other countries would be that the absence of a Second Amendment equivalent means that the likelihood of a random person being armed is low enough to make the risk of tackling a suspect with less than lethal force an acceptable one. But the USA is clearly so culturally attached to freedom of gun ownership that it's not going to countenance even serious discussion of a solution of that sort any time soon, and contains so many privately owned firearms that implementation would be a colossally expensive nightmare. It seems to me that they've made their choice, they're stuck with it, and a certain number of tragedies like this are the inevitable result.
Dave