Arizona’s “stand your ground” law
A.R.S. 13-411 reads:
(A) A person is justified in threatening or using both physical force and deadly physical force against another if and to the extent the person reasonably believes that physical force or deadly physical force is immediately necessary to prevent the other’s commission of … aggravated assault under section 13-1204, subsection A, paragraphs 1 and 2.
(B) There is no duty to retreat before threatening or using physical force or deadly physical force justified by subsection A of this section.
So perhaps Steven Jones didn’t have to retreat if he reasonably believed that the frat brothers were going to beat him up, he could stand his ground and open fire. Assuming he didn’t start the fight in the first place.
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It should be noted that “stand your ground” had nothing to do with the Zimmerman case, because Zimmerman was on the ground (not standing up) being beaten up and didn’t have a reasonable opportunity to retreat.