National Constitution Center
National Constitution Center: Interactive Constitution: Search and Seizure
Provides the text to the Fourth Amendment with further explanation about unreasonable searches and seizures.
Other
Justia: u.s. Supreme Court Center: Cases and Opinions: Search and Seizure
A comprehensive overview of the Fourth Amendment, on the legality of searches and seizures of persons or property, makes note of Supreme Court rulings on the subject of unreasonable searches and searches.