So it’s not exactly about the shooting itself but creating the negligent conditions that allowed it to happen. From what I understand, as a producer he had his crew cut as many safety corners as possible to reduce costs. His direction to cut corners led to oversights in safety, which led to the prop masters making safety mistakes and accidentslly loading a live round into a firearm designated as a prop, which led to a person dying because of an on set accident. If he didn’t direct his crew to cut corners, the chances of somebody dying is dramatically reduced and makes this line of work incredibly safe despite the potentially dangerous implements used.
So the case is about “did the executive decisions Baldwin make to cut corners on safety contribute to the death of someone on set?”