A peace officer, without a warrant, may arrest a person if the officer has probable cause to believe: 1. A felony has been committed."Probable cause" is the standard required for a law enforcement officer to make an arrest as it relates to DUI or other criminal charges. 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. If the police do not have a warrant or see evidence of a crime, they have no more right to be on your property or to access your home than any other person. If you willingly give consent for the search, then officers do not need a warrant or probable cause to search. If you get arrested in Maricopa County, the police must read you your Miranda rights, otherwise known as the Miranda warning. Generally, law enforcement cannot enter your home to conduct a search or make an arrest without a valid warrant. Learn more about the types of warrants and how to find out if you have a warrant out for your arrest from Maricopa County Superior Courts. Search and seizure law in Arizona is very complex.