I doubt if anyone gloats over a killing except a sadist. However, why should one be anything other than relieved if the bad guy gets shot? They have the right to rob someone else, they have the right to run away when confronted (unless they threaten to come back and harm you during the process) they have the right to surrender and await police protection. Should they choose other options I reserve the right to exercise my judgement and use the final option which will result in their death...