(2) DEADLY FORCE. Except as otherwise provided under this section, a peace officer may use deadly force against another person only when necessary to protect against an immediate threat of serious physical injury or death to the officer or another person. For purposes of this subsection :
"Immediate threat of serious physical injury or death" means that, based on the totality of the circumstances, it is objectively reasonable to believe that a person has the present and apparent ability, opportunity, and intent to immediately cause death or serious bodily injury to the peace officer or another person.