Justice Harlan's Reasonable Expectation Test In Katz Vs. United States

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Justice Harlan’s reasonable expectations test in Katz vs. United States (1967) considers whether a person has an “actual (subjective) expectation of privacy” and if so, whether such expectation is one that “society is prepared to recognize as ‘reasonable.’” (Solove and Schwartz 99) If there is no expectation of privacy, there is no search and no seizure (reasonable, or not), and hence no Fourth Amendment issue. Likewise, we must first ascertain whether a search took place. A few questions from a police officer, a frisk, or the taking of blood samples do not constitute a search. (Solove and Schwartz 83; 86) Likewise, the plain view doctrine establishes that objects knowingly exhibited in a public area, in plain view for police to see, do not …show more content…

A warranted search is per say reasonable. Officers may then employ various reasonable means of obtaining the information, e.g. search the content of U.S. mail, one’s house or office, or deploy an undercover agent as in Lewis v. United States (1966). They may, without need for physical intrusion as under the archaic trespass doctrine, utilize modern surveillance methods, such as electronic eavesdropping as in Lopez v. United States (1963) or heat signatures. (Solove and Schwartz 83) Under the third party doctrine, officers may obtain information that you voluntarily provide to your bank, accountant, ISP or e-mail provider as per United States v. Forrester (2008). (Ibid 197; 199) Conversely, “a warrantless search is generally considered to be per se unreasonable.” (Ibid 99) As noted in Katz v. United States (1967), “‘the mandate of the [Fourth] Amendment requires adherence to judicial processes,’ and that searches conducted outside the judicial process, without prior approval by judge or magistrate, are per se unreasonable…” (Ibid 99) Fail to meet any of the four elements and the warrant does not meet constitutional muster (see Berger v. New York (1967) wherein officers failed to stop surveillance at

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