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PRO
also known as James Tanner Duncan
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J. Tanner Duncan is a Cincinnati-born criminal defense attorney who takes the fight head-on—and doesn’t back down. Practicing in both Ohio and Kentucky, he handles everything from life-altering felony charges to misdemeanors and traffic offenses, bringing the same aggressive, results-driven approach to every case.
From investigation through trial, Tanner is strategic, relentless, and built for high-stakes defense. He has handled cases involving murder, shootings, sex crimes, DUI/OVIs, domestic violence, and more—where the consequences can follow a client for life. He prepares every case for trial, challenges every piece of evidence, and forces the prosecution to prove its case.
Tanner thrives in the courtroom while others avoid it. He makes sure clients understand exactly what’s at risk—whether it’s jail time, permanent records, registration requirements, license suspensions, or firearm restrictions—and builds a defense designed to protect their future.
Licensed in both Ohio and Kentucky, Tanner is uniquely positioned to handle cases with cross-state consequences, including probation, parole, and license issues. His approach is simple: take control early, apply pressure, and fight relentlessly to win.
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Practice Areas
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State: Kentucky
Acquired: 2021
No misconduct found
State: Ohio
Acquired: 2019
No misconduct found
9078 Union Centre Blvd. Suite 350, West Chester, OH, 45069
rittgers.com/104 Client Reviews
Showing 46 - 50 of 56 reviews | Case Results
Posted by Brian | January 07, 2023 | Hired Attorney | Criminal Defense
Excellent lawyer and person
Tanner Is an excellent lawyer that does what he says he will do and is very knowledgeable of the law. He helped me with my case with professionalism and pride in what he does. I would definitely recommend Tanner and Suhre and Associates with any criminal defense issues again as they were able to get ...
Posted by Yanni Korakis | December 06, 2022 | Hired Attorney | Criminal Defense
local legend
I got charged with minor in possession of alcohol. This man proceeded to take of everything for me and went above and beyond to make I get this charge off. He talked to the diversion officers for me, made sure I stayed on top of my diversion program and when I missed court on accident he made sure I...
Posted by anonymous | December 06, 2022 | Hired Attorney | Criminal Defense
Can help with any type of DUI - Underage / Regular
Life is a learning lesson and along the way you make mistakes. It’s always good to have someone who knows what they are doing and can give you professional help throughout your case. Tanner really helped get me through my case and through some dark times and got me off on minimal consequences. Excell...
Posted by anonymous | December 06, 2022 | Hired Attorney | Lawsuits & Disputes
Professional, understanding, and expeditious.
Tanner listened to my legal concerns, explained how he could assist me, and resolved my case in less than a month. I didn't lose time from my career or my personal life because Tanner and his team effectively communicated with me handled everything. I didn't even have to appear in court. I truly ap...
Posted by Justin | December 06, 2022 | Hired Attorney
Your New Best Friend
Think of your best friend. The guy you call because you know he’s always got your back. Forget that guy. Tanner is your new best friend. He’s the guy who’s always got your back and he gets you much better results. Seriously, Tanner saved my day, my month, and my year. Professional, fast acting, a...
"I endorse this lawyer. Tanner is smart, talented, hard-working, and kind. I appreciate his vigorous representation of his clients."
"Tanner is a fantastic criminal defense attorney. He is hardworking and dedicated to getting his clients the best outcome. He is well known in most courts in the Greater Cincinnati area and that reputation carries over to his interactions with judges and prosecutors. Would highly recommend."
"Tanner is a bright, motivated, and aggressive lawyer. He cares deeply about his clients and works tirelessly to get the best result possible. I endorse Tanner without reservation."
"Not only does Tanner have the intelligence and experience to aggressively represent his clients at the highest level, he genuinely cares about his clients and the outcome they receive. I would stand next to Mr. Duncan in any type of criminal matter with confidence."
Criminal defense lawyer
2019
Cum Laude, Northern Kentucky University - Salmon P. Chase College of Law
2019
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2019
Order of the Barristers, Northern Kentucky University - Salmon P. Chase College of Law
2019
Law Review - Associate Editor, Northern Kentucky University - Salmon P. Chase College of Law
2018
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2018
Law Review - Associate Editor, Northern Kentucky University - Salmon P. Chase College of Law
2017
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2016
Dean's List, Northern Kentucky University - Salmon P. Chase College of Law
2025 - Present
Trial Attorney, Rittgers & Rittgers
2021 - 2025
Trial Attorney, Suhre & Associates, LLC
2019
JD - Juris Doctor
2014
BS - Bachelor of Science (History)
2024
2024
Criminal Defense Practice
English