According to chapter four, the Fourth Amendment of the United States Constitution protects all citizens from unreasonable searches and seizures of property (personal or otherwise) by law enforcement officers, hence the requirement of a search warrant. A search warrant is issued by a judge and is used to authorize law enforcement officers to search a particular location and seize specific items, most often suspected evidence. The first and by far the most important step in obtaining a search warrant is to show probable cause that a crime was committed and that the items in question or connected to the crime are very likely to be found in the specific place named in the warrant. In order for the search warrant to be deemed valid it must first
