Yes, congratulations to young Jack.
I have one of those little S&W Air Weight 38 specials, (model 36?), we cannot CC in CA. but I always thought of CC as a defense against being mugged or carjacked, close range type of thing. A 38 special FMJ round to the head or upper chest is more than enough unless you are being carjacked by a grizzly bear.
If I was far enough away from the bad guy, I'd try to run or take cover even if I was armed. There are rare instances where an armed citizen has stopped a mass shooter, (Texas church recently), that might want for more gun and only works if the operator is really trained and skilled, like the Texas church dude. Your son probably fits in that category.