08/07/2012 12:56 pm ET

George Zimmerman's Lawyer, Mark O'Mara, To Speak At Convention For Gun Rights Group

Mark O'Mara, the attorney for George Zimmerman, who is charged with killing Trayvon Martin, is set to speak to a gun rights group next month.

According to a notice by the Second Amendment Foundation, O'Mara will address the group at its annual conference, although it does not specify what O'Mara will be discussing.

"With new battles over individual rights in the age of terrorism, attacks on our gun rights from the UN, a number of Second Amendment cases in the courts and an important upcoming election, your attendance is critical," the e-mail reads. "The theme of Elect Liberty is most important as we set the pro-gun rights agenda for the year to come."

Zimmerman was charged with second-degree murder after he shot and killed Trayvon Martin, an unarmed teenager, in Sanford, Fl. Zimmerman claimed that he shot Martin in self-defense. The case sparked a furor after Zimmerman was initially released following the shooting, and many felt that Martin, whom Zimmerman said looked suspicious, had been racially profiled.

Zimmerman is expected to invoke the state's Stand Your Ground law, which gives wide discretion for the use of deadly force to citizens who feel "a reasonable fear of imminent peril of death or great bodily harm."

O'Mara took over Zimmerman's defense when his previous two attorneys resigned after they said they could not locate him and that he was ignoring their counsel.

Alan Gottlieb, the founder of the Second Amendment Foundation, has been an outspoken supporter of the Stand Your Ground law. But back in March, he told Chris Matthews of MSNBC that the law might not apply to Zimmerman. "He may very well use that to defend himself, but the truth is in this case, he was the pursuer," Gottliebe said. "He didn't stand his ground."

"I'm not sure that defense is going to work with him at all," Gottlieb said.

Evidence from George Zimmerman case