William Pitt, Earl of Chatham, on the occasion of debate in Parliament on the searches incident to the enforcement of an excise on cider, eloquently expressed the principle:
"The poorest man may in his cottage bid defiance to all the forces of the Crown. It may be frail; its roof may shake; the wind may blow through it; the storm may enter; the rain may enter; but the King of England cannot enter -- all his force dares not cross the threshold of the ruined tenement!"
Amendment IV of the United States Constitution
The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
"The point of the Fourth Amendment, which often is not grasped by zealous officers, is not that it denies law enforcement the support of the usual inferences which reasonable men draw from evidence. Its protection consists in requiring that those inferences be drawn by a neutral and detached magistrate instead of being judged by the officer engaged in the often competitive enterprise of ferreting out crime." Johnson v. United States (1948) "In dealing with probable cause, . . . as the very name implies, we deal with probabilities. These are not technical; they are the factual and practical considerations of everyday life on which reasonable and prudent men, not legal technicians, act." Brinegar v. United States, supra, at 338 U. S. 175. Probable cause exists where "the facts and circumstances within their [the arresting officers'] knowledge and of which they had reasonably trustworthy information [are] sufficient in themselves to warrant a man of reasonable caution in the belief that" an offense has been or is being committed. Carroll v. United States, 267 U. S. 132, 267 U. S. 162.
Exceptions to the Fourth Amendment warrant requirement- The U.S. Supreme court throughout the course of this country's history has established (13) exceptions to the warrant requirement for conducting searches. The exceptions are as follows:
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Arrest/Detention | Body Search | Border | Consent | Curtilage | Deception | Evidence | Exigent Circumstance | Home/Property | Informant | K-9 | Mentally Ill | Open Field | Plain View | Protective Sweep | Roadblock | Search Warrants | Stop & Frisk | Surveillance | Traffic Stop/Veh Search