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Choosing an Expert Witness


Experts are required in cases that involve scientific evidence.

Civil and criminal cases that involve DNA evidence, engineering evidence, fiber analysis, medical standards, etc. normally involve the use of experts to explain the technical information that is normally beyond the jury or judge’s experience. The courts have placed certain requirements on who can qualify as an expert and whether or not the expert’s testimony will be presented to the trier of fact. As such, counsel will want to select a qualified individual who can meet and exceed standards for expertise. Given that both sides will be presenting competing expert views on issues raised in the case, it’s paramount that the expert’s credentials can withstand challenge and that his or her testimony will withstand the gatekeeping function performed by the judge under Daubert and its progeny.



Mark Giangrande

Mark Giangrande

DePaul University

  • Legal research specialist with DePaul University College of Law Library and has practiced law librarianship since 1976
  • Extensive professional law library experience, having served at six law schools, including four in the Chicago area
  • Created and managed law school computing facilities
  • Taught a course in advanced legal research at DePaul University College of Law
  • Has written numerous articles and research guides on a number of subjects, including the use and management of law school computing, and electronic legal research strategies, in addition to guides for researching topical areas of law
  • Lectures regularly on the use of Internet resources as legal research tool
  • Provides research services to practicing attorneys for use in litigation
  • Member of the Illinois Bar, the American Association of Law Libraries and the Chicago Association of Law Libraries
  • J.D. degree, IIT/Chicago-Kent College of Law; B.S. degree in education, Northwestern University; M.L.I.S. degree, University of Texas at Austin, also served as a graduate fellow at the Tarlton Law Library
  • Can be contacted at [email protected]

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