Mamadou B. from Guinea murdered neighbor Christoph R. by cutting his throat from ear to ear. He blindfolded victim first then stole TV and ignited body with trash. Voices commanded him to kill German then Ukrainian. He stabbed Ukrainian girlfriend Vita S. in neck after sex. She survived after fending off knife. Ran naked from window after failed murder. Free for two weeks post-murder before arrest. Granted residence extension two days after killing for good integration. Worked as care assistant with school degree. Diagnosed paranoid schizophrenic by expert. Confessed fully to murders attempt theft arson. Prosecutor seeks psychiatric commitment not deportation.