Reasonable Expectation of Privacy: The legal standard that determines whether an individual has a reasonable expectation of privacy in a given situation, which is a key factor in determining if a search or seizure is constitutional under the Fourth Amendment.
Exclusionary Rule:A legal doctrine that generally prevents evidence obtained in violation of the Fourth Amendment from being used in criminal proceedings, as a means of deterring unlawful government conduct.
Probable Cause: The legal standard that requires law enforcement to have sufficient evidence to believe that a crime has been committed or is about to be committed before conducting a search or making an arrest.