He threw the first punch.
Two on one ass-kicking turns things somewhat in his favor due to disparity of force.
When he hits the ground the young guys back off, threat hasn't ended but appears to be subsiding considerably.
Wife enters the scene with a handgun, somewhat justified due to the two on one and him on the ground.
Young dudes take off, threat is over.
Dude doubles down on stupid and takes gun from wife and pops a few caps at the fleeing young guys.
= Throw him in jail and make an example out of him. Felony stupid deserves a felony conviction so he can never own another firearm.
My analysis of the situation.
edit: the dude with the horizontal striped shirt and vertical striped pants, he deserves a beating for crimes against fashion.
edit 2: I saw some clinch work, and no spare magazine was required.