Florida prosecutors have dropped domestic violences charges against George Zimmerman, the man who killed unarmed African-American teenager Trayvon Martin. Zimmerman was arrested last month after his girlfriend, Samantha Scheibe, accused him of pointing a shotgun at her and trying to choke her. But Scheibe has since refused to cooperate with prosecutors. Zimmerman had been ordered to surrender his firearms after his latest arrest, but will now get them back, as he did after being acquitted of Martin’s murder in July.