wow... I wondered if it was a suicide. Someone just taking the class to have access to a gun. Maybe they will start pre-qualifying people to take the class to weed out anyone who cannot handle weapons.
I feel worse for the instructors and other people taking the class than the woman herself. It would be pretty scarring to see that right before your eyes. Probably moreso had it been more than a .22
This touches on the exact problem with all gun control laws and policies: you can never have the level of control you desire. The control you think you have is an illusion. When people are involved, you can not anticipate what all individuals will do in a given situation. Sure, you can keep the guns out of the hands of people who have been tagged by the system as high risk, but the system itself is flawed and doesn't catch everyone.
The classes can "pre-qualify" people for every class, but that won't do much to prevent suicidal people from attendance. This specific case was so outside the norm, there isn't much chance of predicting the outcome. Unless the stats have changed, women are far less likely to use a firearm for suicide than men. They more often than not use a suicide attempt to ask for help, and therefore are not inclined to use violent (and more efficient) means to kill themselves. They also tend to make the attempts alone, not in public. If that is still the norm, there isn't much you could have done to screen this person out from taking the class. Add to that, being barred access to firearms doesn't prevent someone from committing suicide. There are so many other methods.
No one can predict how people will behave. All we can do is examine the situation afterward and try to learn what we can that might be helpful.