There is no way "non-lethal" weapons should result in a death. But on the other hand, cops should not have to worry about their safety because a city's team has won a ball game. Is this South American soccer? Should the cops just retreat to their station houses and let the celebrators do as they will?
When sports produces riots, win or lose, we, as a nation, need to do some very serious mental self-examination.
The rules for use of this particular type of "non-lethal weapon" must be re-evaluated. It is still a useful "non-lethal weapon" but only in certain well defined situations.
It's "non-lethal" use is now applicable only when it is used to deliver body blows to the torso while contact with the head is clearly seen to be potentially fatal.
As such, it needs to be reserved for stand-off situations where is single individual is holding off police with a knife or other potentially lethal short range weapon. In such situations, the police must be able to target the perp's torso and nothing else.
In crowd control situations or in situation's when a perp is running through innocent bystanders, it's use is no can longer be thought of as "non-lethal".
That's why weapons like pepper spray, batons, TASERs, etc., aren't known by professionals as "non-lethal" weapons anymore. The preferred term is "less lethal," meaning there is a much, much lower probability of kill than from a more traditional weapon like a firearm.
This young woman's death is a horrible tragedy, made worse by the fact that the police most certainly did NOT intend to use deadly force. If the officer in question meant to use deadly force, he would have drawn and fired his service weapon instead of the pepperball.