Neb. Rev. Stat. § 23-1603: Neb. Rev. Stat. § 23-1603

If any county treasurer neglects or refuses to render any account or settlement required by law, fails or neglects to account for any balance due the state, county, township, school district, or any other municipal subdivision, or is guilty of any other misconduct in office, the county board may forthwith remove the county treasurer from office, and appoint some suitable person to perform the duties of the county treasurer until a successor is elected or appointed and qualified.