The Court today arms the police with a way routinely to dishonor the Fourth Amendment 's warrant requirement in drug cases. The Fourth Amendment requires searches and seizures be reasonable.The Court has held a search or seizure without a warrant presumptively unreasonable. What Does the Fourth Amendment Mean? King, 131 S. Ct. 1849 (2011). The Fourth Amendment protects against unreasonable searches and seizures. It requires a warrant, based on probable cause, for searches. It will eliminate loopholes that let the government investigate us and our property without having to get a warrant. When police have valid consent to search a house, neither a warrant nor probable cause is necessary. The consent must be given voluntarily.