Trey Mayfield is a seasoned trial lawyer and former prosecutor whose practice has covered a broad array of substantive legal areas, from commercial disputes and business torts to criminal prosecution and defense. Trey’s practice focuses on the representation of false claims act claims by whistleblowers, plaintiffs in fraud matters and businesses in commercial disputes. His clients have included individuals, Fortune 100 companies, religious institutions, and small businesses.
In addition to over a decade with Juris Day (formerly Day & Johns), Trey served as an Assistant United States Attorney, where he investigated and prosecuted bank, wire, securities, tax and federal funds fraud, public corruption, and money laundering. Earlier in his career, he practiced in the litigation departments of the national law firms of Sidley Austin, Fenwick & West, and Weil, Gotshal & Manges. From 1999-2000, Trey served as a judicial clerk to United States District Judge Robert H. Cleland in Detroit, Michigan. Outside of practice, he has taught several legal courses as an adjunct professor at Georgetown University.
Trey represents both plaintiffs and defendants in state and federal courts throughout the United States. His matters are complex and varied, and have included novel issues involving religious freedom, free speech, covenants not to compete, RICO and internal corporate investigations, employment discrimination, class actions, securities fraud, appellate advocacy, and criminal fraud prosecutions.
Trey received his juris doctorate from Northwestern University School of Law in Chicago, where he served as a Note & Comment Editor on the Journal of Criminal Law & Criminology, and was a member of Northwestern’s national champion trial team. He graduated from Michigan State University with a B.A. in Public Administration. Prior to attending law school, Trey managed regulatory affairs for a national trade association. He is licensed to practice in Virginia and the District of Columbia.