Turns out the shotgun was the first firearm his deceased father had given him, so he didn't want to drop in on the concrete. Seeing me draw down on their relative (he was related to the individuals involved in the domestic) defused the argument between the other three. The family were all frequent flyers at our department and the kid with the shotgun had gotten into an argument with his mother who promptly kicked him out. He left with the shotgun but returned when he saw me arrive because he thought I was going to arrest one of his family members and planned to interfere.
The backup officers all said they would have shot him after the first three commands to drop the gun....guess it was a good thing they arrived late.
I've been involved in 5 or 6 incidents such as this where I would have been cleared if I would have shot a suspect - but I never fired my weapon due to good training, a calm head and common sense. Wonder why the FBI has so much trouble, I was just a lowly local cop - you know, the kind held in such contempt by the Feds.
Of the close calls I've had I just didn't think it was the right time to shoot, I did'nt feel threatened enough; and two of the three I almost shot were coming towards me with knives. And I did have an incident with a man with a shotgun also. (you start to forget over the years)
Theres a huge gray area there but I think you have to wait until you at least see a weapon.