exclusionary rule - meaning and definition. What is exclusionary rule
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What (who) is exclusionary rule - definition

U.S. RULE AGAINST EVIDENCE THAT CAME THROUGH A GOVERNMENT VIOLATION OF THE DEFENDANT'S CONSTITUTIONAL RIGHTS
Exclusionary Rule; Exclusionary principle

exclusionary rule         
n. the rule that evidence secured by illegal means and in bad faith cannot be introduced in a criminal trial. The technical term is that it is "excluded" upon a motion to suppress made by the lawyer for the accused. It is based on the constitutional requirement that ":no [person] can be deprived of life, liberty, or property, without due process of law" (Fifth Amendment to the Constitution, applied to the states by 14th Amendment). A technical error in a search warrant made in good faith will not cause exclusion of the evidence obtained under that warrant. In 1995 the U. S. Supreme Court ruled that evidence obtained with a warrant that had been cancelled could be admitted if the law enforcement officer believed it was still in force. However, evidence which was uncovered as a result of obtaining other evidence illegally will be excluded, under the "fruit of the poisonous tree doctrine." Thus, if an illegal wire tap reveals the location of other evidence, both the transcript of the wire tap conversation and the evidence to which the listeners were directed will be excluded. See also: due process of law fruit of the poisonous tree motion to suppress
Exclusionary rule         
In the United States, the exclusionary rule is a legal rule, based on constitutional law, that prevents evidence collected or analyzed in violation of the defendant's constitutional rights from being used in a court of law. This may be considered an example of a prophylactic rule formulated by the judiciary in order to protect a constitutional right.
Zaitsev's rule         
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  • Alexander Mikhaylovich Zaitsev
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EMPIRICAL RULE PREDICTING THE MAJOR PRODUCT(S) IN ELIMINATION REACTION
Saytzeff's rule; Zaitsev's Rule; Zaitsev's product; Saytzeff rule; Saytzeff's Rule; Saytzev's rule; Zaytsev product; Saytzeff Rule; Zaitsev rule; Saytsev's rule; Saytsev rule
In organic chemistry, Zaitsev's rule (or Saytzeff's rule, Saytzev's rule) is an empirical rule for predicting the favored alkene product(s) in elimination reactions. While at the University of Kazan, Russian chemist Alexander Zaitsev studied a variety of different elimination reactions and observed a general trend in the resulting alkenes.

Wikipedia

Exclusionary rule

In the United States, the exclusionary rule is a legal rule, based on constitutional law, that prevents evidence collected or analyzed in violation of the defendant's constitutional rights from being used in a court of law. This may be considered an example of a prophylactic rule formulated by the judiciary in order to protect a constitutional right. The exclusionary rule may also, in some circumstances at least, be considered to follow directly from the constitutional language, such as the Fifth Amendment's command that no person "shall be compelled in any criminal case to be a witness against himself" and that no person "shall be deprived of life, liberty or property without due process of law."

The exclusionary rule is grounded in the Fourth Amendment in the Bill of Rights, and it is intended to protect citizens from illegal searches and seizures. The exclusionary rule is also designed to provide a remedy and disincentive for criminal prosecution from prosecutors and police who illegally gather evidence in violation of the Fifth Amendment and its protection against self-incrimination. The exclusionary rule also protects against violations of the Sixth Amendment, which guarantees the right to counsel.

Most states also have their own exclusionary remedies for illegally obtained evidence under their state constitutions and/or statutes, some of which predate the federal constitutional guarantees against unlawful searches and seizures and compelled self-incrimination.

This rule is occasionally referred to as a legal technicality because it allows defendants a defense that does not address whether the crime was actually committed. In this respect, it is similar to the explicit rule in the Fifth Amendment protecting people from double jeopardy. In strict cases, when an illegal action is used by police/prosecution to gain any incriminating result, all evidence whose recovery stemmed from the illegal action—this evidence is known as "fruit of the poisonous tree"—can be thrown out from a jury (or be grounds for a mistrial if too much information has been irrevocably revealed).

The exclusionary rule applies to all persons within the United States regardless of whether they are citizens, immigrants (legal or illegal), or visitors.

Examples of use of exclusionary rule
1. But Roberts wrote that the judicially created exclusionary rule did not provide that such evidence be automatically kept from juries.
2. But in recent years, the Michigan Supreme Court has joined the minority that says no such "exclusionary rule" is required.
3. First, they held that there is an "exclusionary" rule precluding the use of evidence obtained by torture.
4. "As laid out in our cases, the exclusionary rule serves to deter deliberate, reckless, or grossly negligent conduct, or in some circumstances recurring or systemic negligence," Roberts wrote.
5. Five, including Kennedy, signed on to an opinion that questioned the very basis of the exclusionary rule to suppress evidence illegally seized by police.