1) Police officer will be no bill 'cause the lady had a knife, was going towards him and didn't obey his commands.

2) Doesn't matter if the lady comprehend EN

3) In a fight or flight respond, shoot to lame is stupid and can cause the officer and or the public to potentially be injured. Situational awareness, environmental variables, decision and reactionary time, surface area of target, successful outcome and etc ... are so fleeting that the likely hood of arresting an attacker attack is slim to none if one just try to lame and or disarm the attacker. If you're going to shoot, always shoot to kill! A torso has 10x the square area vs. the hand.