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Evidence

Expert witnesses

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University of Michigan Law School

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Full-Text Articles in Law

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.


Detection Of Deception: The Case Of Handwriting Expertise, Samuel R. Gross Jan 2001

Detection Of Deception: The Case Of Handwriting Expertise, Samuel R. Gross

Articles

The basic method of handwriting identification is the same now as it was in Twelfth Night: to compare the questioned writing with other writings by the supposed writer. This can be done from memory if (like Malvolio) one is already familiar with the claimed author's handwriting, or by examining the questioned document together with known samples. It's a simple, obvious task. Any person-certainly any literate person--can have a go at it. The claim by handwriting experts, now and in the past, is equally simple: We can do it better.


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 …


Witness--Competency Of An Allopathic Expert In The Field Of Homeopathy--Opinion On Very Fact The Jury Must Determine, Victor H. Lane Jan 1919

Witness--Competency Of An Allopathic Expert In The Field Of Homeopathy--Opinion On Very Fact The Jury Must Determine, Victor H. Lane

Articles

Van Sickle v. Doolittle, (Ia., 1918), 169 N. W. 141, was an action for malpractice against a physician of the homeopathic school of medicine. Upon the trial, a physician of the allopathic school was called, and after testifying that he was unskilled in the science of homeopathy, was allowed to testify that the treatment shown to have been given to the patient by defendant, would produce no physiological effect, and that proper treatment required the giving of such medicines as would produce such effect. This was held error upon the ground that the defendant was called to treat the patient …


Examination Of The Medical Expert, Harry B. Hutchins Jan 1905

Examination Of The Medical Expert, Harry B. Hutchins

Articles

The expert witness differs essentially from the ordinary witness in at least two particulars; first, in that the field of his testimony is outside the range of ordinary knowledge and experience; and, secondly, in that his testimony in the great majority of cases is in the form of opinions or conclusions that are deemed necessary for the proper guidance of the jury. It goes without saying that the 'lawyer who undertakes the examination of the expert should have such familiarity with the subject of inquiry as will enable him to develop it through the expert logically and clearly, but unfortunately …


The Physician As An Expert, Harry B. Hutchins Jan 1904

The Physician As An Expert, Harry B. Hutchins

Articles

Expert evidence is evidence of a scientific or technical character in regard to a matter that is outside the domain of ordinary experience and knowledge. The evidence is usually in the form of opinions or conclusions based upon facts that for the purposes of an opinion are assumed to be true, although it may be in regard to scientific facts. The expert is one who has had special training or opportunities in a particular subject that the ordinary witness has not enjoyed, and who has thereby acquired certain habits of judgment.that render his explanations and opinions in the field of …


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.