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Although the Daubert standard is now the law in federal court and over half of the states, the Frye standard remains the law in some jurisdictions including California, Illinois, Pennsylvania, and Washington. [7] Florida passed a bill to adopt the Daubert standard as the law governing expert witness testimony, which took effect on July 1, 2013. [8]
If qualified by the court, then the expert may testify "in the form of an opinion or otherwise" so long as: "(1) the testimony is based upon sufficient facts or data, (2) the testimony is the product of reliable principles and methods, and (3) the witness has applied the principles and methods reliably to the facts of the case."
Note that under California Evidence Code ("CEC") §§769, 770, and 1235, prior inconsistent statements may be used for both impeachment and as substantive evidence, even if they were not originally made under oath at a formal proceeding, as long as "the witness was so examined while testifying as to give him an opportunity to explain or to deny ...
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 ...
A problem with Daubert is that the presiding judge may admit testimony which derives from highly contested data. The judge may expand the limits contained in the "school of thought" precedent. Papers that are self-published may be admitted as the basis for expert testimony. Non-peer reviewed journals may also be admitted in similar fashion.
First, a witness can testify as to the chain of custody through which the evidence passed from the time of the discovery up until the trial. Second, the evidence can be authenticated by the opinion of an expert witness examining the evidence to determine if it has all of the properties that it would be expected to have if it were authentic.
Under Daubert, certain factors contribute to the reliability, and hence the admissibility, of expert testimony, one of which is the general validity of the expert's methods. The district court found the tire expert's methods not to be scientifically valid, and hence excluded his testimony. This resulted in a conclusion that Kumho Tire would ...
Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993), is a United States Supreme Court case determining the standard for admitting expert testimony in federal courts. In Daubert , the Court held that the enactment of the Federal Rules of Evidence implicitly overturned the Frye standard ; the standard that the Court articulated is referred to ...