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Martin J. Costello Attorney at Law

Equal Justice

Under the Law


Bar Admissions

  • U.S. Supreme Court, U.S. Court of Appeals for the Second & Eighth Circuits, U.S. District Court for the Districts of New York & Minnesota, U.S. Court of Appeals for the Armed Forces, District of Columbia Court of Appeals
  • District of Columbia, New York, Minnesota, Iowa, and North Dakota


  • University of Minnesota (Ph.D., honors, 1987)
  • University of Minnesota Law School (J.D., cum laude, 1974)
  • University of Wisonsin-Madison (M.A., honors, 1972)
  • College of St. Thomas (B.A., cum laude, 1969)

Profesional Committees

  • Minnesota Labor & Employment Certification Board, Minnesota Judicial Appointments Commission, Supreme Court Advisory Committee on the Rules of Criminal Procedure; Criminal Forms Committee, and Chair, Criminal Courts Study Commission

Professional Associations

  • National, State, and Local Bar Associations in Washington, D.C., NY, MN, IA, ND & ABA

Publications and Teaching

  • Author, Minnesota Misdemeanors; Co-author, Minnesota Evidentiary Foundations; Contributing editor, The Developing Labor Law
  • Adjunct Professor/Clinical Instructor, Alternative Dispute Resolution (ADR) and Criminal Law and Procedure, William Mitchell College of Law & UM Law School (1974 - Present)
  • Facutly, Minnesota Criminal Justice & Labor Employment Institutes (1995 - Present)