John Dunn


Some have described me as “unwavering” when it comes to principles. Others say that I exhibit the trait of "loyalty to a fault" or that I am "utterly relentless” when pursuing an objective. As your attorney, I promise to be a loyal advocate and to be unwavering in the pursuit of your goals. I am a zealous advocate that does not shy away from conflict and litigation. I believe that the strongest weapon that an attorney can have is knowledge of his case. I will aggressively prepare your case for litigation while attempting to resolve the issues on favorable terms - a kind of "peace through strength" approach to the practice of law.

What do other lawyers say?

 "In this day of large law firms and multi-million dollar budgets for state and federal governments, don't ever forget that ONE dedicated and talented criminal defense lawyer took on the entire state of Oklahoma Department of Corrections, Attorney General's Office and beat the hell out of them.  Who says the days of the solo practitioner and Lone Wolf are gone?  Not me."  

 - Jack Dempsey Pointer     Former President of the Oklahoma Criminal Defense Lawyers Association


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The University of Tulsa College of Law, Tulsa, OK
Juris Doctor, December 2005

Oklahoma State University, Stillwater, OK
Bachelor of Science in Chemical Engineering, May 1995


The Law Offices of John M. Dunn, PLLC                                  December  2006–  Present

Owner / Attorney

  • Specialized in litigation and litigated matters
  • State and Federal appellate practice
  • Federal, State, and Municipal criminal practice
  • Federal and State civil practice

McCann Law                                                                            2006

Associate / Attorney

  • Specialized in litigation and litigated matters
  • Appeared with clients in court
  • Prepared and responded to discovery
  • Prepared legal briefs
  • Legal research

Lyons Clark & Mensching May 2005– May 2006
Legal Intern / Associate

  • Appeared with clients in court
  • Prepared and responded to discovery
  • Prepared legal briefs
  • Legal research

Osage County District Attorney’s Office June 2004 – March 2005
Legal Intern

  • Conducted felony jury trial
  • Worked on both felony and misdemeanor dockets
  • Conducted arraignments
  • Drafted opinions concerning meanings of state statutes
  • Conducted preliminary hearings
  • Screened cases and draft criminal information
  • Conducted interviews with victims and witnesses
  • Negotiated plea bargain agreements
  • Wrote briefs
  • Argued motions

Pawnee County District Attorney’s Office Summer 2002, 2003

  • Drafted opinions concerning interpretations of statutes
  • Screened cases and drafted criminal information


ENCO Environmental Co., Inc. May 1994 – Present
Project Manager / Process Engineer / President

  • Facilitate and participate in HAZOP studies and address recommendations resulting from those studies
  • Design ASME pressure vessels, heat exchangers, and foundations
  • Design and evaluate oil and grease interceptors
  • Instruct numerous OSHA required training, including HAZWOPER, hydrogen sulfide, and HAZCOM
  • Draft proposals and engaged in sales and marketing of engineering and environmental services
  • Prepare environmental compliance reporting documentation as required by federal and state law, including writing contingency plans intended to prevent the contamination of storm water or the surrounding environment resulting from spills, establishing best management practices and preparation of air and storm water permits
  • Prepare and defend clean air and storm water permits
  • Provide expert testimony
  • Perform facility / environmental audits, including third party evaluation of environmental compliance reports
  • Conduct numerous property audits for industrial and manufacturing facilities, as well as Phase I and Phase II audits for commercial properties prior to sale
  • Advise clients concerning environmental compliance under the regulations
  • Engage in client representation before both federal and state environmental and safety agencies
  • Prepare RCRA waste manifesting system and biennial waste reports and waste management plan

Pawnee County Sheriff’s Office July 1999 – September 2004
Lieutenant / East Side Supervisor

  • Supervised day-to-day activities for all of the deputies on east side of the county, reviewed their reports prior to submission to the district attorney’s office
  • Conducted investigations (burglary, drugs, murder, sex crimes, arson)
  • Acted as lead investigator in numerous narcotics’ investigations resulting in the seizure of property and the conviction of many perpetrators
  • Dealt directly with the public during public meetings and took actions to handle complaints and concerns
  • Participated on many decision making committees, including the policy writing committee, the use of force review board, and the hiring board


  • Oklahoma Bar Association (OBA# 20975)
  • Admitted to the Federal Bar for the Eastern District of Oklahoma
  • Admitted to the Federal Bar for the Western District of Oklahoma
  • Admitted to the Federal Bar for the Northern District of Oklahoma
  • Oklahoma Criminal Defense Lawyers Association
  • Registered Professional Engineer
  • Certified Hazardous Materials Manager (CHMM #8237)
  • HAZWOPER Certification (40 hrs.)
  • Oklahoma Society of Professional Engineers
  • Full Time CLEET Certified Peace Officer
  • Standardized Field Sobriety Certified
  • DPS Breathalyzer Operator / Intoxilyzer Supervisor #7890S
  • 40-Hour OBNDD Clandestine Methamphetamine Lab Certified
  • Intermediate Police Certification
  • Basic Police Instructor


John M. Dunn, Illinois v. Caballes: The Day the Supreme Court Lost its Dog Kyllo, 76 Okla. Bar Jnl. 1790 (August 2005).

John M. Dunn, Georgia v. Randolph: Beginning of the End for Third-Party Waivers, 78 Okla. Bar Jnl. 677 (March 2007).

John M. Dunn and Daniel W. Crunkleton, Blanket Medical Releases and Client Privacy: The Dangers of Releasing HIPAA into the Wild, 78 Okla. Bar Jnl. 1951 (August 2007).


2013 Recipient of the OCDLA Thurgood Marshall Award for Outstanding Appellate Advocacy

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The information you obtain at this site is not, nor is it intended to be, legal advice.
You should consult an attorney for individual advice regarding your own situation.



If you are searching for a Tulsa criminal defense attorney, or Tulsa criminal attorney , you need to contact John Dunn.  His expertise as a Tulsa Oklahoma attorney  and determination to represent clients with the best of his ability requires Mr. Dunn spend a great amount of time with the potential client before they are even a client - before they have spent a single penny on their legal defense - reviewing their case and determining what kind of defense to put on.  Following the client interview, Mr. Dunn reviews the police reports and the state's evidence and explores each avenue that may afford a legal or factual defense for his client.

John has assisted his clients as a Tulsa DUI lawyer, If you are needing a Tulsa DUI attorney , please visit our FAQ section of DUI defense info. Please call our law office quickly to obtain the best defense as quickly as possible.

John Dunn is a Tulsa criminal lawyer. You can visit the firm's website at


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