The implication in O'Mara's argument was that Zimmerman, who is white and Hispanic, who was armed, and who ignored a 911 dispatcher's instructions not to follow Trayvon, had more of a right to stand his ground than did 17-year-old Trayvon, who was black. And the verdict suggests the jurors agreed.
Data from other states with stand-your-ground laws indicate that the Zimmerman jury was not alone in being sympathetic to such a claim. Whites are significantly more successful claiming self-defense when their attacker is black than blacks are when fighting back against an attacker who is white, according to one study.
To some, such findings are a consequence of the pandemic of violence plaguing elements of the black community. But to others, they suggest that stand-your-ground laws have allowed perceptions of the black community – sometimes accurate, sometimes not – to become a legal justification for using deadly force.
Stand-your-ground laws have begun to change the calculus of self-defense in the United States. The idea behind them is to "expand the legal justification for the use of lethal force in self-defense, thereby lowering the expected cost of using lethal force and increasing the expected cost of committing violent crime," say researchers Cheng Cheng and Mark Hoekstra in a Texas A&M study.
Statistics included in the study bore that out, showing that justifiable homicides rose by 8 percent in stand-your-ground states, amounting to some 600 additional killings.