Neb. Rev. Stat. § 14-604

The chief of police of a city of the metropolitan class shall be subject to the orders of the mayor in the suppression of riots, tumultuous disturbances, and breaches of the peace. He or she may pursue and arrest any person fleeing from justice in any part of the state and shall bring all persons arrested by him or her before the county court for trial or examination. He or she may receive and execute any proper authority for the arrest and detention of criminals fleeing or escaping from other places or states.