What does unreasonable searches and seizures mean?

Answer 1

Unreasonable searches are those performed without a warrant or probable cause. Probable cause is established when a law enforcement officer can reasonably suspect the commission of a crime, without explicitly violating the suspect's expectation of privacy. For instance, if someone were to rob another person on the street in plain view of others, and then run into his private home, an officer could enter the property and apprehend the criminal. But if an officer randomly decided to search a house without permission or a search warrant, the search would be unreasonable, and the fruits of the search would be suppressed in court.