An improper search in Utah is an illegal search that violates an individual's constitutional right to privacy. Article I, Section 14.What Does the Fourth Amendment Mean? "No-knock warrant" means a lawful search warrant that authorizes entry onto a premises without notice to any occupant on the premises at the time of service. No warrant is required if the suspect consented to the search. Under the Fourth Amendment of the United States Constitution, law enforcement officers must obtain a warrant before conducting a search. The Fourth Amendment sets out the right to be free from "unreasonable searches and seizures" and establishes conditions under which search warrants may be used. Constitutional Protections in Utah Criminal Cases. The Fourth Amendment guarantees protection against unreasonable warrantless searches and seizures. The officers will obtain the search warrant after completing an application and affidavit supporting the warrant request.