George Zimmerman, the man who killed unarmed black teenager Trayvon Martin, has been arrested on charges of domestic violence and aggravated assault. Zimmerman was detained in Sanford, Florida on Monday after his girlfriend accused him of pointing a shotgun at her during an argument. The woman, Samantha Scheibe, said Zimmerman had four guns in the home and was breaking furniture during an angry tirade. Zimmerman’s estranged wife accused him of threatening her earlier this year but no charges were filed.