Some back ground on Zimmerman...
http://www.rawstory.com/rs/2013/07/15/george-zimmerman-shouldnt-have-had-a-gun/
In July 2005, he was arrested for“resisting officer with violence.” The neighborhood watch volunteer who wanted to be a cop got into a scuffle with cops who were questioning a friend for alleged underage drinking. The charges were reduced and then waived after he entered an alcohol education program. Then in August 2005, Zimmerman’s former fiance sought a restraining order against him because of domestic violence. Zimmerman sought a restraining order against her in return. Both were granted. Meanwhile, over the course of eight years, Zimmerman made at least 46 calls to the Sanford (Fla.) Police Department reporting suspicious activity involving black males.