Self Defense

A helpful way to learn self defense is to separate the defense into situations in which non-deadly force is allowable from situations in which deadly force is allowable. There's more to say about deadly force, but first, non-deadly force. 

A person who is not initially at fault may use such non-deadly force as the person reasonably believes is necessary to protect against the imminent use of unlawful threat upon that person. There is no duty to retreat prior to using non-deadly force. 

It's worth noting the word "reasonably" above. A word like that turns this test into one that focuses not on the subjective perception of the person claiming self defense, but instead asks whether a reasonable person would have believed that the non-deadly force was necessary. This objective standard also applies when deadly force is involved. You'll see the word "reasonably" used often in this post. 

The use of deadly force for self defense has a bit more complexity to it. A person may use deadly force  only if the person is without fault and is confronted with unlawful force. Further, the person claiming self defense must reasonably believe that imminent death or great bodily harm is threatened upon that person. 

There is generally no duty to retreat before using deadly force (and this is the majority rule to apply by default on the UBE), but the minority view is that a person must retreat before using deadly force if retreat can be done safely. But even the minority view does not require retreat if the attack occurs in the victim's home, the attack occurs while the victim is making a lawful arrest, or the assailant is in the process of robbing the victim.

Occasionally, an initial aggressor will claim the privilege of self defense. If one is the initial aggressor, one may not use force (deadly or non-deadly) in defense unless the initial aggressor withdrew from the confrontation and communicated to the other the desire to withdraw, or if the victim of the initial aggressor suddenly escalates a confrontation by the initial aggressor and the initial aggressor has no opportunity to retreat. 

The above sets forth all the rules for self defense that you'll need to know, but there are a few topics that are adjacent to self defense, and worth noting. Occasionally someone might claim a privilege to defend others rather than oneself. A person can defend others if the person reasonably believes that the other has the legal right to defend himself. The person defending the other can use the degree of force that the person reasonably believes the other has the legal right to use. 

Lastly, a person can use non-deadly force to defend their dwelling if the person reasonably believes that such conduct is necessary to prevent or terminate another's unlawful entry into or attack upon the dwelling. Deadly force is never allowable to defend the dwelling, but it may be used to prevent a violent entry into the dwelling if a person reasonably believes that the use of force is necessary to prevent a personal attack on themself or on others or to prevent a felony in the dwelling.