Police need a warrant or probable cause to search. In the United States court system, probable cause refers to facts or evidence that would make a reasonable person believe that a crime or wrong doing has been, is being, or will be committed. The evidence is important during court proceedings. In fact, evidence can make or break a case. Some searches are also allowed during incidents that lead to an arrest. A search warrant is a document that authorizes police officers to search a person or place to obtain evidence for presentation in criminal prosecutions. Police officers obtain search warrants by giving evidence to a judge to establish probable cause to believe that a search will reveal evidence related to a crime. If the officers have established probable cause, the judge will issue the warrant. The fourth amendment to the U.S. Constitution states that persons have a right to be free from unreasonable searches and