The basic authority of a police officer to arrest in Nebraska with­out a warrant as set forth by statute is confined to those situations in which the arrestee is found committing a crime. In addition, private persons are by statute authorized to arrest if a felony or petit larceny has in fact been committed and there exist reasonable grounds for believing that the person arrested is guilty.

However, an examination of past decisions concerning the authority of an officer to arrest for a crime not committed within his presence, and for which he has no warrant, points out the uncertainty in the existing law.