** FILE ** This undated file police photo provided by the Orange County Jail via The Miami Herald shows George Zimmerman, a neighborhood watch volunteer who shot and killed black Florida teenager Trayvon Martin on Feb. 26. (AP Photo/Orange County Jail via The Miami Herald, File)

** FILE ** This undated file police photo provided by the Orange County Jail via The Miami Herald shows George Zimmerman, a neighborhood watch volunteer who shot and killed black Florida teenager Trayvon Martin on Feb. 26. (AP Photo/Orange County Jail via The Miami Herald, File)