Warrantless search of cell phone incident to arrest is unconstitutional. What Does the Fourth Amendment Mean?The 4th Amendment of the U.S. Constitution protects people and not places. This means that the right to be free from unlawful search and seizure is personal. Any search without a warrant is an exception to the warrant requirement of each of these documents. c. The Fourth Amendment generally requires government officials to obtain an arrest warrant or search warrant to execute a valid search and seizure. No-Knock warrants consistent with the Massachusetts Police Reform Bill. A police officer must fill out an affidavit and present it to a neutral judge or magistrate to obtain a warrant. The Fourth Amendment also protects against bodily intrusions, such as blood tests of intoxicated drivers. These two legal frameworks prevent law enforcement from searching an individual, their automobile or their private residence without a search warrant.