Utah Attorney General's Office

While attending the University of Utah School of Law, Professor Mangrum was associate editor of the Law Review. He was in private practice in Salt Lake City from 1975-1977; was Rotary International Foundation Fellow in 1977 and in 1978; and he joined the Creighton law faculty in 1979. He received a visiting scholar appointment to the University of Edinburgh in the fall of 1986. He has taught as a visiting professor at the University of Utah law School in 1985, 1996, 2004. 2006 and 2013. He was a visiting professor for Touro Law School at Hebrew University in Jerusalem for the summer of 2008.

He has written over thirty articles and three books. His book Zion in the Courts: A Legal History of The Church of Jesus Christ of Latter-Day Saints, 1830-1900 (1988) (University of Illinois Press) won the National Alpha Sigma Nu Book Award for 1989. His treatise, Mangrum on Nebraska Evidence (Thomsen Reuters, annual 2003-2013), serves as a primary source for practitioners and is frequently cited by the Nebraska courts on evidentiary issues. His treatise, Mangrum and Benson on Utah Evidence (Thomsen Reuters, annual 2004-2013) also serves as a primary source for Utah practitioners and is frequently cited by the courts in Utah. He regularly lectures to practitioners and the judiciary on evidentiary issues in Nebraska and Utah. He has successfully coached trial teams for the Texas Young Lawyers Trial Competition (TYLA) or National Trial Competition and the American Association of Justice (formerly ATLA) every year since 1989. He has also successfully coached teams for the ABA Arbitration Competition since 2008.