Neb. Rev. Stat. § 16-327: Neb. Rev. Stat. § 16-327

The mayor or city council of a city of the first class shall have power, when he, she, or it deems it necessary, to require any officer of the city to exhibit his or her accounts or other papers and make reports to the city council, in writing, touching any subject or matter it may require pertaining to the office.