By Edgar Treiguts, CNN
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(CNN) - Tuesday marks one year since Trayvon Martin was shot and killed. Martin is the Florida teenager who had a fatal confrontation with neighborhood watchman, George Zimmerman, in Sanford, Florida.
The incident sparked protests across the nation over the issue of race relations.
But it also prompted Florida, and other states, to take another look at the law pivotal to this case, the so-called "stand your ground" law.
It's a defense that Zimmerman expects to use when he goes to trial in June on second-degree murder charges. Language in Florida's "stand your ground" law makes it easier to prove self-defense, and is a law that prosecutors like Scott Burns aren't fans of. Burns is executive director of the National District Attorney's Association:
[2:43] "If somebody breaks into your house and you shoot them, that's easier for prosecutors to deal with. If there's an argument in a parking lot and someone shoots someone in the head, that's a little more difficult. Especially if you have a 'stand your ground' law that says you didn't have to retreat."
Burns says in the year since the Martin shooting, a vast majority of states have revisited their self-defense or "stand your ground" laws, with some making changes.