About Justin
Justin Duffy took an unconventional route into the law. He studied at William Mitchell College of Law, where classroom debates and clinical work shaped his approach to courtroom advocacy. He left law school prepared for the particular rhythms of criminal practice in Minnesota.
Early in his career Duffy learned the value of steady preparation and plainspoken argument. He moved into criminal defense work and built a practice that relies on careful case analysis and clear communication with clients. Colleagues describe him as pragmatic in court and thorough in investigation.
Duffy holds membership in the State Bar of Minnesota and in national and regional criminal defense organizations. He is a current member of the Minnesota Association of Criminal Defense Lawyers and the National Association of Criminal Defense Lawyers. Those affiliations keep him connected to peers and to developments in criminal law across the state and country.
His work takes him into Minnesota courts. He represents clients in a range of criminal matters and emphasizes procedural protections and client rights. He prepares cases for hearings and trials, and seeks resolutions that reflect the facts and law at hand. He also handles pretrial strategy and plea negotiations when they serve a client’s interests.
Peers note that Duffy focuses on clear legal thinking rather than theatricality. He approaches each file by assembling evidence, testing assumptions and laying out practical options. That method shapes how he talks to judges, prosecutors and clients alike.
Outside the courtroom he keeps current through association meetings and continuing legal education. He attends seminars and exchanges ideas with other defense lawyers. Those conversations influence how he evaluates investigative leads and crafts motions.
Duffy works from The Law Office of John J. Leunig, where he practices criminal defense in Minnesota. He maintains active professional memberships and remains engaged with issues affecting criminal practice in the state. His current practice centers on representing individuals accused of criminal offenses in Minnesota courts.
