Neb. Rev. Stat. § 83-1223

The hearing officer shall have the power by subpoena to compel the appearance of witnesses and the production of any relevant evidence. Any witness compelled to attend or produce evidence shall be entitled to the fees and expenses allowed in district court. Any failure to respond to such subpoena shall be certified by the director to the district court of Lancaster County for enforcement or for punishment for contempt of the district court.