B. To defend himself or herself or a 3rd person from what he the officer reasonably believes to be the imminent use of unlawful nondeadly force encountered while attempting to effect such an arrest or while seeking to prevent such an escape.

2. A law enforcement officer is justified in using deadly force only when he the officer reasonably believes such force is necessary:

A. To defend himself or herself or a 3rd person from what he the officer reasonably believes is the imminent use of unlawful deadly force; or

B. To effect an arrest or prevent the escape from arrest of a person when the law enforcement officer reasonably believes that the person has committed a crime involving the use or threatened use of deadly force, is using a dangerous weapon in attempting to escape or otherwise indicates that the person is likely to endanger seriously human life or to inflict serious bodily injury unless apprehended without delay; and

(1) The law enforcement officer has made reasonable efforts to advise the person that the officer is a law enforcement officer attempting to effect an arrest or prevent the escape from arrest and the officer has reasonable grounds to believe that the person is aware of this advice; or

(2) The law enforcement officer reasonably believes that the person to be arrested otherwise knows that the officer is a law enforcement officer attempting to effect an arrest or prevent the escape from arrest.

For purposes of this paragraph, "a reasonable belief that another has committed a crime involving use or threatened use of deadly force" means such reasonable belief in facts, circumstances and the law which, if true, would constitute such an offense by that person. If the facts and circumstances reasonably believed would not constitute such an offense, an erroneous but reasonable belief that the law is otherwise justifies the use of deadly force to make an arrest or prevent an escape.