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Who Must Testify To The Results Of A Forensic Laboratory Test? Bullcoming V. New Mexico, Richard D. Friedman Jan 2011

Who Must Testify To The Results Of A Forensic Laboratory Test? Bullcoming V. New Mexico, Richard D. Friedman

Articles

Does the Confrontation Clause permit the prosecution to introduce a forensic laboratory report through the in-court testimony of a supervisor or other person who did not perform or observe the reported test?


Squeezing Daubert Out Of The Picture, Richard D. Friedman Jan 2003

Squeezing Daubert Out Of The Picture, Richard D. Friedman

Articles

In this essay, I will offer some thoughts on how we might reframe the issues governing the admissibility of expert evidence. My principal focus is not on any particular type of expert evidence but on broader questions: the extent to which we ought to rely on rulings of admissibility, the standards that should govern admissibility rulings, and the role of the trial and appellate courts in making those rulings. To some extent, I will concentrate on the context of criminal cases, but for the most part my conclusions apply in both civil and criminal litigation. Here are my conclusions: First, …


Minimizing The Jury Over-Valuation Concern (Visions Of Rationality In Evidence Law Symposium), Richard D. Friedman Jan 2003

Minimizing The Jury Over-Valuation Concern (Visions Of Rationality In Evidence Law Symposium), Richard D. Friedman

Articles

A great deal of the rhetoric of evidence discourse concerns the supposed cognitive inadequacies of the jury. In various contexts we are told that although an item of evidence is probative, it must be excluded because the jury will give it too much weight. I believe this approach has played far too great a role in evidentiary law, and that it is an interesting project to see whether we can construct a satisfactory body of law without relying at all on the cognitive inadequacy argument. I think that, at least to a large extent, we can. In some settings, where …


Expert Testimony On Fingerprints: An Internet Exchange, Richard D. Friedman, David H. Kaye, Jennifer Mnookin, Dale Nance, Michael Saks Jan 2002

Expert Testimony On Fingerprints: An Internet Exchange, Richard D. Friedman, David H. Kaye, Jennifer Mnookin, Dale Nance, Michael Saks

Articles

In United States v. Llera Plaza, 188 F. Supp. 2d 549 (E.D. Pa. 2002), a federal district initially limited expert opinion testimony on fingerprint identifications because the government was unable to show that such identifications were sufficiently valid and reliable under Federal Rule of Evidence 702. Then, the court withdrew the opinion. This article reproduces an exchange of notes on the initial opinion submitted by five law professors.


The Death And Transfiguration Of Frye, Richard D. Friedman Jan 1994

The Death And Transfiguration Of Frye, Richard D. Friedman

Articles

The rule of Frye v. United States was seventy years old, and had long dominated American law on the question of how well established a scientific principle must be for it to provide the basis for expert testimony. Even after the passage of the Federal Rules of Evidence, several of the federal circuits, as well as various states, purported to adhere to Frye's "general acceptance" standard. But now, unanimously, briefly, and with no apparent angst, the United States Supreme Court has held in Daubert v. Merrell Dow Pharmaceuticals, Inc. that the Frye rule is incompatible with the Federal Rules.


Expert Evidence, Samuel R. Gross Jan 1991

Expert Evidence, Samuel R. Gross

Articles

It seems that the use of expert witnesses in common law courts has always been troublesome. In his Treatise on the Law of Evidence, first published in 1848, Judge John Pitt Taylor describes several classes of witnesses whose testimony should be viewed with caution, including: enslaved people (which accounts for "the lamentable neglect of truth, which is evinced by most of the nations of India, by the subjects of the Czar, and by many of the peasantry in Ireland"); women (because they are more susceptible to "an innate vain love of the marvelous"); and "foreigners and others ... living out …


Compensation Of Experts, Henry W. Rogers Dec 1882

Compensation Of Experts, Henry W. Rogers

Articles

The law relating to the compensation of experts is somewhat unsettled, and the cases are not numerous in which the subject has been considered. This very fact, however, lends additional interest to the subject, and the question is one of great importance. In some of the States the law expressly provides that when a witness is summoned to testify as an expert he shall be entitled to extra compensation. Such a provision may be found in the laws of Iowa, of North Carolina, and of Rhode Island.