The prosecution said the convict stabbed Mr Muhammad Ibrahim with a sharp object on his abdomen, neck and left arm, which led to his death.
Mr Idris urged the new chief judge to ensure proper things were done in the judiciary.
The Human Rights and Social Justice Organisation urged the NJC to promptly recommend a new chief judge to Governor Nasir Idris.
The governor assured that his administration would do everything possible to make judiciary workers happy.
Justice Umar Abubakar was sworn in by Governor Atiku Bagudu on Saturday in the state capital of Birnin Kebbi.
