Personally I'd rather shoot to kill with a handgun rather than use something like a flare gun. The reason? It would be much harder for the next of kin to sue in civil court for wrongful death compensation when the deceased was in the commission of a crime, than it would be for the living 'flare-faced' scumbag to garner sympathy in court due to your 'cruel and unusual' self-defense tactics regardless of the crime being committed at the time.
Either way you had better be justified in shooting. A handgun cleans up the situation much better than a flare.
Either way you had better be justified in shooting. A handgun cleans up the situation much better than a flare.