Armed robbery is not a capital crime in any jurisdiction. The guy is in front of you with a weapon demanding money...cap him on the spot in the front.

Guy is running away? You better tackle him because it's not self defense anymore.

"I call that bold talk for a one-eyed fat man." --Robert Duvall.
"Fill your hand, you son-of-a-bitch!" --John Wayne.
~Molɔ̀ːn Labé Skýla~