Re: of course
Sadly precedent does show a few problems. In WWI when gas was used it had a slightly annoying problem of blowing back on the attacking forces who had fired the damned stuff.
In other cases the high level of adrenalin in the suspect required very high concentrations of the gas so could be lethal anyway.
How do you control wind and other air movements?
How do you arrange for the delivery system to be available right now?
It is hard to know the required level in good conditions, how big was the space, what would the required concentration of gas be?
There was talk of him have built home produced bombs, a vest remains viable with the suspect intoxicated and probably more dangerous to spontaneous firing.
It is easy to be an armchair speculator, it is harder to do what is needed.
If people want to bend anything to create a martyr they will, it is the 'internet way' these days.
Remember what he achieved, a huge increase in distrust; does that make him a real martyr in your eyes?
How many more black Americans will now be killed because they might be another version of him?
Was he deranged? Possibly, should he have been helped earlier? Possibly, Had he not only crossed lines, but smashed them to bits a different outcome might have possible.
As it is he is just another sad suicide by cop case.
Did he help the cause which promoted the march?
I leave you to answer that one and keep my own private council.