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For evidence to be admissible enough to be admitted, the party proffering the evidence must be able to show that the source of the evidence makes it so. If evidence is in the form of witness testimony, the party that introduces the evidence must lay the groundwork for the witness's credibility and knowledge.
For example, in a DUI case, the prosecutor may not admit evidence of a prior instance of driving impaired to show that the defendant acted in conformity and drove impaired on the day he is charged with doing so. However such evidence may be admissible if the defense has argued the defendant had no knowledge driving impaired was a crime.
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 scientific ...
Under the common law, such evidence was at one time considered hearsay - a statement made out of court being introduced to prove the truth of the statement - and was not admissible except to rebut the testimony of an opposing expert witness. There were four ways to introduce such evidence: [citation needed]
Evidence governs the use of testimony (e.g., oral or written statements, such as an affidavit), exhibits (e.g., physical objects), documentary material, or demonstrative evidence, which are admissible (i.e., allowed to be considered by the trier of fact, such as jury) in a judicial or administrative proceeding (e.g., a court of law).
Tank on admissibility of chat room logs; Rule 801 [12] - Evidence is hearsay if it constitutes a statement offered for its substantive truth and is not excluded from the definition of hearsay, unless it is an exception under rules 803, [13] 804 [14] or 807. [15] See also United States v. Rollins on the admissibility of computer generated records.
The Federal Rules of Evidence states rules regarding a piece of evidence's relevancy and whether or not it is admissible. [7] F.R.E. 402 states relevant evidence is admissible unless otherwise excluded by: "The U.S. Constitution, a federal statute, the Federal Rules of Evidence, or other rules proscribed by the Supreme Court."
One of the most referenced rules in determining the admissibility of forensic hypnosis as evidence is the Frye Standard (1923). Frye set the precedent that scientific methods and theories must gain general acceptance to be considered admissible as evidence in court and concerned the use of systolic blood pressure for lie detection , another ...