I don't really think a warning shot indicates an unwillingness to kill in every situation. I will if I feel I have to, but too many scenarios to run through to say definitively a warning shot indicates such a feeling.
"The bended knee is not a tradition of our Corps"-LtGen. Holland M "Howlin' Mad" Smith, USMC,1949
Have you forgotten yet? Look down and swear by the slain of the War that you'll NEVER forget. [Siegfried Sassoon,"Aftermath,"1919]