A. A peace officer, without a warrant, may arrest a person if the officer has probable cause to believe: 1. Reasonable suspicion is not enough for an arrest or a search warrant.Stop and Frisk - In Terry v. 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. An officer cannot arrest an individual, merely because they "have a hunch". Arrest warrants are issued to police when a judge is presented with a sworn statement to establish a reasonable belief that a person has committed a crime. For the most part, officers must obtain a warrant to legally search you, your car, or your home and use any evidence they find against you. An arrest warrant is a legal document to arrest a specific person based on a specific crime. The police can enter your house without a search warrant when exigent circumstances exist. The goal of law enforcement is to charge you with and eventually have you convicted of a crime.