The Criminal Defense Attorney Doctors, Lawyers, Business Executives, Accountants, Federal Agents, Police Officers, Military Members, Professional Athletes, Entertainment Figures, And First Time Offenders Call When They Need A Criminal Defense Attorney.
So Should You.
Top Criminal Attorneys with offices in Tampa, Orlando, and Miami, defending cases in Florida and nationwide
A Trusted Name In Criminal Defense
Firm founder Mark J. O’Brien is a former prosecutor who has handled thousands of criminal cases. Since 2003, O’Brien Hatfield, P.A. has handled hundreds of cases in both federal and state courts.
We have the knowledge and resources to craft tenacious criminal defense strategies, including firm private investigators and medical professional networks.
We understand the potential our work has to change the trajectory of our clients’ lives. That’s why we focus on one thing and one thing only. We wake up each day with one goal and one purpose: you.
How We Can HELP YOU
Federal Crimes
State Crimes
Appeals and Post-Conviction Motions
Federal/State
White Collar Crimes
Federal/State
Drug Crimes
Federal/State
Sex Crimes
Federal/State
Whistleblower Claims
Mark J. O’Brien’s cases have been featured in
Many lawyers advertise various awards they have “won” from various websites proclaiming them to be a “Top Lawyer in Florida”, a “Top Attorney Under 40” or a “10.0 Rating”, and so forth. Please note that any attorney who advertises such “awards” has to pay money to the particular website to be granted these “honors”. I refuse to pay for an award or honor. I rely on my experience, my training and results. If you are looking for attorneys who accept paid for “awards” or “honors”, we are not your law firm. However, here is what federal judges across the country are saying about our firm in open court in real cases.
Read What Judges Are Saying
MEET OUR TEAM MEMBERS
Experienced In Both Federal And State Courts
Our extensive trial experience makes us uniquely prepared to litigate any federal or state criminal case, no matter how complex.
We’ve won favorable verdicts and settlements for all kinds of white collar crime and fraud cases such as health care fraud, mortgage fraud and tax evasion allegations in Florida.
We also defend individuals charged with federal and state drug crimes. Federal courts and the state of Florida aggressively prosecute drug crimes, levying harsh penalties against offenders. Our Hillsborough County criminal defense attorneys represent individuals charged with crimes ranging from conspiracy to committing drug trafficking or importation to possession of marijuana, oxycodone or prescription drugs, and the manufacturing and distribution of methamphetamine throughout Florida.
Mark, thank you for everything. I will forever be indebted to you. You have stood by me and believed in me when it was not the popular thing to do. You are an amazing advocate.
Adam Filthaut
- Former Partner at the Law Firm of Adams and Diaco (Robert Adams and Stephen Diaco)
- MJ (Todd Schnitt) Morning Show/Bubba the Love Sponge Clem Trial
- Phil Campbell DUI Setup/Florida Bar Trial
Client Testimonials
Life Sentence Vacated
This video captures the moment we told Mr. McBride of his appellate victory through a prison phone call. From the point he was arrested to the point of this call, Mr. McBride fought for nearly seven years to right his wrongful arrest, conviction and life sentence. In this video you are able to hear the raw emotion in Mr. McBride’s voice when he learns we won his appeal. Mr. McBride graciously allowed us to post this video to our website to give hope to anyone going through the same struggle he went through.