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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/106 Client Reviews
Showing 76 - 80 of 106 reviews
Posted by Geoff | June 07, 2023 | Hired Attorney
He did a great job!
He kept me apprised of each phase of my case in an expeditious manner. I would definitely recommend him to anyone looking for an excellent attorney.
Posted by anonymous | June 04, 2023 | Hired Attorney
5 STARS
I am very pleased with this firm! Communication was great and never had a problem getting ahold of my lawyer Tanner. Tanner was a great help and I would recommend him or anyone in their firm for any legal help!
Posted by Anthony | May 25, 2023 | Hired Attorney
First DUI
This was my first time needing legal representation. Tanner was the best. He was super helpful throughout keeping me updated and informed. Hopefully, I won't need his assistance again but if I did I'd definitely seek him out.
Posted by anonymous | April 25, 2023 | Hired Attorney
Extremely satisfied
While searching for a criminal defense lawyer we came across Mr. Duncan and his law firm. We did some research and are extremely pleased that we have chosen Mr. Duncan to defend my fiancé. He immediately responded to our inquiry and gave us a reasonable quote. He asked a lot of questions to get a ...
Posted by Rachel | April 20, 2023 | Hired Attorney
The best lawyer, that you’re gonna find
I was facing some very serious charges. If I could give him a ten star review I would he is a very trustworthy and honest lawyer, he not only took my case to heart. He did it in the best timely manner. He could answered any questions I had day or night And walked me through the legal process. If you’...
"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