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About Sean Buckley

Pascagoula-Gulfport, Mississippi criminal defense attorney Sean Buckley has over two decades of experience aggressively defending the accused in state and federal court. He’s among an elite group of Mississippi criminal defense attorneys rated AV-Preeminent by Martindale Hubbell – the gold standard of attorney ratings – for achieving the highest level of legal expertise, communication skills, and ethical standards. If you’ve been charged with a criminal offense, or you’re under criminal investigation, Sean Buckley is ready to fight for your legal rights and defend your reputation.
Over the last 22 years, Sean Buckley has won numerous “Not Guilty” jury verdicts in a wide variety of state and federal criminal cases including Drug Possession, Domestic Violence, Murder, Federal Conspiracy, and Federal Health Care Fraud. He’s defended a diverse list of clients including a sitting United States District Judge, a former United States Congressman, a decorated NASA astronaut, business executives, professionals, and good people from all walks of life. Each case is unique, and previous successful results do not guarantee successful outcomes for future cases.
Annually since 2010, Mr. Buckley has been recognized for his expertise in federal criminal law by serving as lead Attorney Editor of O’Connor’s Federal Criminal Rules & Codes (12th ed.), a nationally respected law book trusted by federal criminal lawyers across the United States. He’s publicly commented on criminal law matters of national interest and been favorably quoted in The New York Times, The Washington Post, The Wall Street Journal, and by broadcast media organizations including Fox News, ABC News, NBC News, CBS News, and CNN.
Sean Buckley and his family reside in Jackson County, Mississippi and this law firm primarily serves clients with criminal law matters pending in South Mississippi. Cases outside Mississippi are accepted on a case-by-case basis. This firm is a family business and Mr. Buckley’s wife, Marisol Buckley, serves as Case Manager. Marisol is a second-generation Cuban American and provides fluent Spanish language services.

Sean Buckley Criminal Defense Attorney



State Bar Admissions


  • Mississippi, Texas


    Federal Bar Admissions


  • Southern District of Mississippi, Southern District of Texas, Northern District of Texas, Eastern District of Texas, Western District of Texas, Fifth Circuit Court of Appeals




  • The University of Texas School of Law, Austin, Texas (J.D., 1999; American Journal of Criminal Law)


  • Auburn University, Auburn, Alabama (B.A., 1996 Magna Cum Laude, Phi Kappa Phi)




  • DeGuerin & Dickson Law Firm
    Houston, Texas (Associate, 2007-2012); trained under nationally famed criminal defense trial lawyer Dick DeGuerin.


  • Habern & Associates
    Houston, Texas (Associate, 2000 – 2007); trained under prominent criminal defense attorney Bill Habern.


  • Office of the Travis County District Attorney
    Austin, Texas (Law Clerk, 1997–1999); trained under white collar and public integrity prosecutors in the Special Prosecution Unit.




  • Buckley, Sean et al., eds. O’Connor’s Federal Criminal Rules & Codes, 12th ed., Thomson Reuters, 2022.


    Professional Associations


  • National Association of Criminal Defense Lawyers (Life Member; Federal Rules Committee, 2010 – 2020; Discovery Reform Committee, 2010-2020)

  • Federal Bar Association

  • Bar Association of the Federal Fifth Circuit

  • Federalist Society

  • American Bar Association

  • Jackson County Bar Association

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