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One of Oklahoma’s premier criminal defense trial attorneys. Corey's professionalism reflects his passion for criminal law and courtroom advocacy. Mr. Brennan’s diligent preparation and experience dealing with prosecutors and judges from all over the state of Oklahoma enable him to effectively defend his clients’ Constitutional rights in both negotiation and courtroom litigation.
Mr. Brennan started his legal career at the Oklahoma City University (OCU) School of Law, where he established himself as a hard-working and dedicated student. His desire to become a trial attorney and his willingness to sacrifice earned him a Limited License to practice law while still attending school as a full-time student.
While in law school, he was selected as a National Member of the Order of Barristers for his excellence in trial practice, and he was awarded the Cali Award for earning top honors in the study of Trial Practice. In addition, Mr. Brennan competed in the American College of Trial Lawyers (ACTL) National Trial competition and was a member of the OCU Law Moot Court Society.
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Chat withState: Oklahoma
Acquired: 2015
No misconduct found
625 NW 13th St. Ste A, Oklahoma City, OK, 73103
38 Client Reviews
Showing 1 - 5 of 5 reviews | Trustworthiness
Posted by Miller | July 17, 2025 | Hired Attorney | Criminal Defense
OUTSTANDING ATTORNEY
A fearless fighter that has your back 1000%. Hiring Corey Brennan as a defense attorney ws the best decision I've ever made. He is the BEST attorney in the state. You want an attorney who is confident, thorough, and unshakably composed. He didn't just know the law -he knew how to communicate it cle...
Posted by anonymous | September 25, 2020 | Hired Attorney | Criminal Defense
OKC’s best lawyer
My experience with Mr. Brennan representing me was nothing below excellent. I had never been in trouble before and I was very scared, nervous, and honestly just confused about the whole situation at first. Once I got Mr. Brennan involved it was like a weight being taken off of my chest! He handled ev...
Posted by Daniel | June 26, 2019 | Hired Attorney | Criminal Defense
Life saving attorney
Corey is hands down the best thing that could have happened to me in my difficult situation. I was arrested and charged with 3 counts. Public intoxication, carrying a firearm while intoxicated, and carrying a firearm where alcohol is consumed. I am a medical professional and a single parent, my abili...
Posted by Sean | January 22, 2018 | Hired Attorney | Criminal Defense
Criminal Defense Attorney
I called Mr. Brennan in August of 2016 looking for an attorney for what I thought was going to be a situation that was surely going to affect the rest of my life. Mr. Brennan right from the start was re-assuring and as well I felt like he cared about genuinely helping me and not just trying to collec...
Posted by Patrick | September 13, 2017 | Hired Attorney
Excellent!
I called Me. Brennan unsure of what my legal options were. He explained my options in detail with terms that I could understand. Hopefully I will never need an attorney again but if I do I will be calling him again!
"Corey is a tough attorney who will vigorously fight for his clients. I have worked with him on multiple occasions, and there are few attorneys that have Corey's passion and work ethic."
Criminal defense lawyer
2015
JD - Juris Doctor
English