Final answer:
The Fourth Amendment requires the police to have a warrant to search someone's property.
Step-by-step explanation:
The amendment that requires the police to have a warrant to search someone's property is the Fourth Amendment of the United States Constitution. The Fourth Amendment requires the police to have a warrant to search someone's property.
According to the Fourth Amendment, people have the right to be secure in their persons, houses, papers, and effects against unreasonable searches and seizures. This means that the police generally need a warrant, issued by a judge, based on probable cause, to search someone's property.
However, there are exceptions to the warrant requirement, such as when a person gives consent to the search, when there are exigent circumstances, or when the items to be seized are in plain view of the police.