George Zimmerman is charged with murder in the death of Trayvon Martin , 17 . His lawyers want to put restrictions on Zimmerman , saying he lives in fear . The defense asks to talk to an investigator about a female voice on a 911 call . Defense says Zimmerman killed the unarmed Martin in self - defense .
George Zimmerman is charged with murder in the death of Trayvon Martin , 17 . His lawyers want to loosen restrictions on Zimmerman , saying he lives in fear . The defense asks to talk to an investigator about a pleading voice on a 911 tape . Defense says Zimmerman killed the unarmed Martin in self-defense .