It explains how Alec will try to weasel out of pointing a functioning handgun at a woman’s chest and pulling the trigger slamming a live round clean through her chest killing her and wounding a second victim.
Let’s go Alec!
His assistant director handed him the revolver and told him it was ‘cold’ i.e. unloaded. The he did what the script told him to.
Didn’t check the firearm? He’s an actor! What does he know about firearms? They hand him a prop, then he does what the script requires.
And yeah, you or I would hang, but that will likely get Baldwin off.