Stand-your-ground law - Wikipedia, the free encyclopedia
In the United States, stand-your-ground law states that a person may justifiably use force in self-defense when there is reasonable belief of an unlawful threat, without an obligation to retreat first. The concept sometimes exists in statutory law and sometimes through common law precedents. One key distinction is whether the concept only applies to defending a home or vehicle, or whether it applies to all lawfully occupied locations. Under these legal concepts, a person is justified in using deadly force in certain situations and the "stand your ground" law would be a defense or immunity to criminal charges and civil suit. The difference between immunity and a defense is that an immunity bars suit, charges, detention and arrest. A defense, such as an affirmative defense, permits a plaintiff or the state to seek civil damages or a criminal conviction but may offer mitigating circumstances that justify the accused's conduct.
More than half of the states in the United States have adopted the Castle doctrine, stating that a person has no duty to retreat when their home is attacked. Some states go a step further, removing the duty of retreat from other locations. "Stand Your Ground", "Line in the Sand" or "No Duty to Retreat" laws thus state that a person has no duty or other requirement to abandon a place in which he has a right to be, or to give up ground to an assailant. Under such laws, there is no duty to retreat from anywhere the defender may legally be.[1] Other restrictions may still exist; such as when in public, a person must be carrying firearms in a legal manner, whether concealed or openly.
"Stand your ground" governs U.S. federal case law in which right of self-defense is asserted against a charge of criminal homicide. The Supreme Court of the United States ruled in Beard v. U.S. (158 U.S. 550 (1895)) that a man who was "on his premises" when he came under attack and "...did not provoke the assault, and had at the time reasonable grounds to believe, and in good faith believed, that the deceased intended to take his life, or do him great bodily harm...was not obliged to retreat, nor to consider whether he could safely retreat, but was entitled to stand his ground."[2][3]
Justice Oliver Wendell Holmes, Jr. declared in Brown v. United States (1921) (256 U.S. 335, 343 (16 May 1921)), a case that upheld the "no duty to retreat" maxim, that "detached reflection cannot be demanded in the presence of an uplifted knife".[4]
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There is a nuance between plain old "self defense" and "stand your ground" but you seem to be missing it. For the statute to be relevant to the Zimmerman case, Zimmerman would have needed to shoot Trayvon before the first punch was landed. At the moment he realized Trayvon was going to attack him, he could have shot him, and claimed defense under SYG. That's not what happened in this case. He WAS attacked, seriously assaulted, and he acted in plain old self defense, no need for SYG.
The fact that SYG law exists in Florida, and the jury was informed of what it says, has nothing to do with the case itself, or the defense of Zimmerman. NOTHING!!