George Zimmerman, a neighborhood watch volunteer who says he was acting in self-defense when he <a href=”http://www.cnn.com/2012/04/11/justice/florida-teen-shooting/index.html”fatally shot teenager Trayvon Martin in Sanford, Florida,has been charged with murder in the second degree, special prosecutor Angela Corey told reporters Wednesday.

Corey said that Zimmerman has surrendered to authorities in Florida and has been arrested.

Police say Zimmerman fatally shot Martin, a 17-year-old African-American, on February 26 in Sanford, Florida, after Martin began walking home from a convenience store. Zimmerman, who is Hispanic and was a neighborhood watch volunteer, had called 911 to complain about a suspicious person in the neighborhood. He was released without charges after claiming self-defense, but the case was referred to a special prosecutor as thousands converged on Sanford to join in protests calling for Zimmerman’s arrest.

The following are running updates on the story:

[Updated at 6:12 p.m. ET] Corey said she wouldn’t discuss what led her to file the second-degree murder charge, other than her conclusion is based on her review of the evidence.

[Updated at 6:07 p.m. ET] George Zimmerman has been charged with second-degree murder in connection with the February 26 shooting of Trayvon Martin, a Florida state attorney announced Wednesday.