SANFORD, Fla. -- George Zimmerman will make his first appearance today after being charged with second degree murder in the death of Trayvon Martin.

State Attorney Angela Corey, the special prosecutor for the case, announced the charge at a nationally televised news conference late Wednesday.

Corey would not go into detail about what specifically lead to charging Zimmerman, saying only that her team is considering all the facts of the case. Zimmerman has maintained since the shooting that he acted in self defense.

According to investigators, Martin was walking through his family's neighborhood when Zimmerman, a neighborhood watch leader, approached him. Zimmerman shot and killed Martin, after he claimed he and Martin got into a physical altercation.

Zimmerman's first appearance is scheduled for 1:30 p.m. in the Seminole County Courthouse. His new attorney, Mark O'Mara said Zimmerman will enter a plea of not guilty and O'Mara is expected to ask that Zimmerman be released on bond. Zimmerman is currently being held in the Seminole County Jail.

First Coast News will have a crew at the courthouse. Check back later today for continuing coverage of the case.