A peace officer, without a warrant, may arrest a person if the officer has probable cause to believe: 1. A felony has been committed.If you get arrested in Maricopa County, the police must read you your Miranda rights, otherwise known as the Miranda warning. The judge may also issue an arrest warrant if there is reason to believe the offender will not voluntarily appear in court at the scheduled time. If you fail to be present for any scheduled court appearance, a warrant may be issued for your arrest. This is also known as a bench warrant. The authority to arrest depends on the existence of a crime or arrest warrant; without a crime or arrest warrant, there can be no arrest. Probable Cause: If the police have probable cause to believe you have committed a crime, they can make an arrest without a warrant. There are two main types of warrants: (1) warrants for the arrest of a person and (2) warrants to search for personal property, persons, or items. "Probable cause" is the standard required for a law enforcement officer to make an arrest as it relates to DUI or other criminal charges.