Yep. Intentionally using less-than-deadly force (knee shot) suggests strongly that you were faced with less than a deadly threat, and therefore had no business using a deadly weapon. Even a bad lawyer could win that case.
Shoot to stop. Center mass. Always.
rule # 1 after a shooting:
do NOT talk to police or reporters unless/until you’ve talked to your lawyer and said lawyer is WITH you.
otherwise, you make excited and STUPID statements like this that can/will be used in court of law against you.