The way I heard it talked about, supposedly there was a previous set armorer before her, and that they walked together with a lot of other crew in protest over repeated and grievous safety violations, and that there had been a high number of accidents already.
Then this girl, who's the daughter of a seasoned movie armorer, was brought in more or less so that Alec Baldwin could claim that he had an armorer, as studio and insurance policy demands it. Conditions didn't improve, and ridiculously irresponsible shit kept going like usual, such as keeping live ammunition on set, storing it next to the guns and blanks, and random people apparently having free access to the guns, going and plinking with them between shoots.
One point I saw repeated was that she allegedly tried to improve conditions on set, but was cockblocked by Baldwin somehow, and that his lawyers are now throwing her under the bus. I'm most skeptical of this part, but who knows.
Take all of that shit with a grain of salt, because that's just rumors I've seen for a while. One thing I learned though is that Pietta's Colt 1873 clones, especially older vintages without the transfer bar (which the gun from the incident is), have some known occasional issues with the hammer not properly engaging the sear. In that sense, Baldwin may not have pulled the trigger as he claims, though this changes nothing for his overall culpability.
I won't expect anything cool like that.