It's unfortunate that we've come to this, but so was I.
My other thought was... if this was CA, the old man would have already been charged and arrested for murder. In CA's opinion, since the man was running away he was no longer a threat. In my opinion, he was no longer a threat at that moment, but if he lived to do it again... he would have been. But that's mere speculation on my part, and would be argued that way.
Did he deserve to die for burglary? Probably not, but he paid that price for his poor decision.
MACS wrote: