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Mapp v. Ohio, 367 U.S. 643 (1961), was a landmark U.S. Supreme Court decision in which the Court ruled that the exclusionary rule, which prevents a prosecutor from using evidence that was obtained by violating the Fourth Amendment to the U.S. Constitution, applies to states as well as the federal government. The Supreme Court accomplished this ...
The open-fields doctrine (also open-field doctrine or open-fields rule), in the U.S. law of criminal procedure, is the legal doctrine that a " warrantless search of the area outside a property owner's curtilage " does not violate the Fourth Amendment to the United States Constitution. However, "unless there is some other legal basis for the ...
Crawford v. Washington, 541 U.S. 36 (2004), is a landmark United States Supreme Court decision that reformulated the standard for determining when the admission of hearsay statements in criminal cases is permitted under the Confrontation Clause of the Sixth Amendment. The Court held that prior testimonial statements of witnesses who have since ...
The Federal Rules of Evidence define hearsay as: A statement that: (1) the declarant does not make while testifying at the current trial or hearing; and (2) a party offers in evidence to prove the truth of the matter asserted in the statement. (F.R.E. 801 (c)).
The Erie case involved a fundamental question of federalism and the jurisdiction of federal courts in the United States. In 1789, the Congress passed a law still in effect today called the Rules of Decision Act (28 U.S.C. § 1652), which states that the laws of a state furnish the rules of decision for a federal court sitting in that state.
Tyson (1842) Erie Railroad Co. v. Tompkins, 304 U.S. 64 (1938), was a landmark U.S. Supreme Court decision in which the Court held that the United States does not have a general federal common law and that U.S. federal courts must apply state law, not federal law, to lawsuits between parties from different states that do not involve federal ...
Payne v. Tennessee, 501 U.S. 808 (1991), was a United States Supreme Court case authored by Chief Justice William Rehnquist which held that testimony in the form of a victim impact statement is admissible during the sentencing phase of a trial and, in death penalty cases, does not violate the Cruel and Unusual Punishment Clause of the Eighth Amendment. [1]
standard. In United States law, the Frye standard, Frye test, or general acceptance test is a judicial test used in some U.S. state courts to determine the admissibility of scientific evidence. It provides that expert opinion based on a scientific technique is admissible only when the technique is generally accepted as reliable in the relevant ...