Hej Buzzcook! I see you are in WA. In WA if you shoot burgler you are fine. Home invasion is a felony that you can counter by any and whatever means are available. It has been my understanding that this has pretty much always been this way....and I have lived in WA since 1970. (and I was over 21 when I got here)
Was your firiend in WA? or BC? If he was in BC, I understand, WA I don't understand...elsewhere? well, depends on where elsewhere is, variations in state law being what they are.