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The Bill of Rights in the National Archives. The Fourth Amendment (Amendment IV) to the United States Constitution is part of the Bill of Rights.It prohibits unreasonable searches and seizures and sets requirements for issuing warrants: warrants must be issued by a judge or magistrate, justified by probable cause, supported by oath or affirmation, and must particularly describe the place to be ...
Johnson v. United States, 333 U.S. 10 (1948), was a significant United States Supreme Court decision addressing search warrants and the Fourth Amendment.In this case, where federal agents had probable cause to search a hotel room but did not obtain a warrant, the Court declared the search was "unreasonable."
The defendant had argued that anticipatory warrants in general violated the Fourth Amendment's requirement that "no Warrants shall issue, but upon probable cause," because the anticipated probable cause does not exist at the time of the warrant's issuance. The Court first noted that the courts of appeals had unanimously rejected this argument ...
An officer acting in good faith and within the scope of a search warrant should not be subjected to Fourth Amendment constitutional violations. It is the magistrate’s or judge’s responsibility to ascertain whether the warrant is supported by sufficient information to support probable cause.
Florida v. Royer, 460 U.S. 491 (1983), was a U.S. Supreme Court case dealing with issues involving the Fourth Amendment. Specifically, the case establishes a firm line in cases where police conduct search and seizure without a warrant. The court ruled that, while it is legal for authorities to target and approach a person based on their ...
Jardines [17] the court ruled that a police officer and narcotic-sniffing dog entering the porch of a home constitutes a search which invokes the requirement of probable cause or a valid search warrant The power of probable cause by K-9 units smelling for drugs is not limited to just airports, but even in schools, public parking lots, high ...
Michigan v. Summers, 452 U.S. 692 (1981), was a 6–3 decision by the United States Supreme Court which held for Fourth Amendment purposes, a warrant to search for contraband founded on probable cause implicitly carries with it the limited authority to detain the occupants of the premises while a proper search is conducted.
United States, 267 U.S. 132 (1925), where the Supreme Court ruled that police officers may make a warrantless search of an automobile if they have probable cause to suspect that it contains contraband. This is known as the "automobile exception" to the Fourth Amendment's warrant requirement. The court's reasoning in Carroll v.