According to the Fourth Amendment, when is a judge allowed to write a warrant?

 - when the judge has a good reason to believe someone has broken the law
 - whenever the police pay the judge enough money
 - whenever the United States Congress is meeting
 - whenever a person refuses to let the police search his or her property
A judge is allowed to write a search warrant when the judge has a good reason to believe someone has broken the law. The Fourth Amendment says that "unreasonable searches" are not allowed. It is not always clear what makes a search "unreasonable." Americans count on judges to decide. The diagram below explains how and when a police officer can get the right to search a person: