Paul C. Giannelli is a Distinguished University Professor Emeritus and the Albert J. Weatherhead III & Richard W. Weatherhead Professor of Law Emeritus at Case Western Reserve University.

He received his J.D. in 1970 from the University of Virginia, where he served as articles editor of the Virginia Law Review. His other degrees include an LL.M. from the University of Virginia and an M.S. in Forensic Science from George Washington University.

Professor Giannelli has written extensively in the field of evidence and criminal procedure, especially on the topic of scientific evidence. He has published articles in the Columbia, Virginia, Cornell, Vanderbilt, Illinois, North Carolina, Fordham, Ohio State, Capital, Cleveland State, Wisconsin, Cardozo, and Case Western Reserve law reviews. He's published in the "Journal of Criminal Law & Criminology" (Northwestern University), "Criminal Law Bulletin," and the "American Criminal Law Review" (Georgetown University).

He has also published in interdisciplinary journals, such as the "International Journal of Clinical & Experimental Hypnosis," the "New Biologist," and the "Journal of Forensic Science." Professor Giannelli authors Rules of Evidence Handbook, 2020 ed. (Baldwins Ohio Practice) and Ohio Criminal Laws and Rules, 2020 ed. (Baldwins Ohio Practice). He also has written or co-authored several other criminal and evidentiary titles, including Katz & Giannelli Criminal Law, 3d (Baldwins Ohio Practice).

Professor Giannellis works have been cited thousands of times in court opinions and the legal literature, including 7 decisions by the U.S. Supreme Court. The New York Times referred to him as an expert on scientific evidence. He has authored an op-ed piece for the Times: When the Evidence Is a Matter of Life and Death, New York Times, Week in Review Op-Ed, Aug. 21, 1994, p. E15.

He is also co-author of a chapter on forensic science in Federal Judicial Center/National Academy of Sciences, Reference Manual on Scientific Evidence (3d ed. 2011). Professor Giannellis work has been cited in nearly 800 judicial opinions throughout this country (including 8 decisions of the U.S. Supreme Court), as well as in foreign courts.

In addition, he has testified before the U.S. Senate Judiciary Committee and served as:

Commissioner, National Commission on Forensic Science
Reporter, American Bar Association Criminal Justice Standards on DNA Evidence
Co-chair of the ABA Ad Hoc Committee on Innocence
Member, National Academy of Sciences, Bullet Lead Elemental Composition Comparison Committee
Special Counsel, Joint Select Evidence Committee, Ohio General Assembly (1978-79)
Member, Ohio Supreme Court Rules Advisory Committee (1985-88)
Counsel for Rules of Evidence, Ohio Supreme Court Rules Advisory Committee (1990-2001)

Before the Rules were adopted, he wrote: The Proposed Ohio Rules of Evidence: The General Assembly, Evidence, and Rulemaking, 29 Case Western Reserve Law Review 16 (1978).

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Baldwin's Ohio Practice Rules of Evidence Handbook, 2025 ed.

Baldwin's Ohio Practice Rules of Evidence Handbook, 2025 ed.