NEW : Defense lawyer says Arias had abusive childhood , personality disorder . NEW : Judge orders new trial for Jodi Arias. A 12-0 vote by jury is required to execute Arias by lethal injection . This means Arias ' lawyers need to convince only one juror to support a life sentence .
NEW : Defense lawyer says Arias had abusive childhood , personality disorder . NEW : Prosecutor describes the bloody slaying in a bathroom . A 12-0 vote by jury is required to execute Arias by lethal injection . This means Arias ' lawyers need to convince only one juror to support a life sentence .