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About me

I have always served my community and attempted to help those in need.  Prior to law school, I worked as a paramedic in many different settings including various rescue and teaching positions as well as serving on a SWAT team in Texas.  These
experiences provided me with many unique opportunities that I have used to my
clients' benefit.

During law school, I worked in the District Attorney's office as well as a major civil litigation firm.  These positions further developed my litigation skills.  Since being admitted to the Colorado Bar, I have dedicated my practice to defending persons charged by the government with various offenses including DUI and traffic offenses, misdemeanors and felonies.

The power of the government, via the police and District Attorney, is almost limitless.  Only the criminal defense attorney can provide a check to this power. It is my hope to provide that check on behalf of my clients.


Photos and videos

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Practice areas


  1. DUI & DWI: 80%
    7 years
  2. Criminal Defense: 15%
  3. Domestic Violence: 5%



Fixed (always), Retainer (sometimes), Free consultation (60 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

45 total 

Are you an attorney? Endorse this lawyer

  • Jay Marcus Tiftickjian

    John is one of the brightest DUI lawyers in Denver and he is a person that I go to for advice on many issues. His advice is always appreciated and I would recommend him to anyone facing a difficult criminal or DUI charge.


    Jay Tiftickjian DUI and DWI Attorney
    Relationship: Fellow lawyer in community

  • Christopher Hunter Cessna

    I am very happy to endorse John Buckley as a true expert and attorney in DUI defense. Unfortunately, what many people facing a DUI don’t know is that there are literally hundreds of attorneys in any metro area who will handle their DUI. However, maybe only a handful of these attorneys truly know how to defend these complex scientific cases. If you submitted to a blood test or breath test then you need an attorney who has years of formal training and experience defending these complex cases. And no one knows blood test cases better than John due to his years of experience as a certified phlebotomist and SWAT team paramedic. Rest easy knowing that John has your case. He is one of the top DUI attorneys in Colorado. Christopher H. Cessna Attorney at Law Denver, CO


    Christopher Cessna DUI and DWI Attorney
    Relationship: Fellow lawyer in community

Contact info

Law Office of John L. Buckley

3773 Cherry Creek North Drive
Suite 575
Denver, CO, 80209-3825


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Forensic Science Geek of the WeekThe McShane Firm2011
Award of Academic Excellence in Trial PracticeUniversity of Denver Sturm College of Law2004
Work experience
TitleCompany nameDuration
AttorneyLaw Office of John L. Buckley2007 - Present
Associate AttorneyLaw Office of Leonard M. Chesler, PC2005 - 2007
Law ClerkLeventhal, Brown and Puga2004 - 2006
Legal Intern18th Judicial District Attorney's Office2004 - 2005
Association namePosition nameDuration
National College of DUI DefenseGeneral Member2013 - Present
American Association for JusticeMember2011 - Present
Colorado Criminal Defense Bar AssociationMember - Legislative Committee2011 - Present
18th Judicial District of Colorado Democratic PartyChair2008 - Present
Colorado Criminal Defense BarMember2003 - Present
Colorado Bar AssociationMemberN/A
Legal cases
Case nameOutcome
State of Colorado v. Joe S.Not guilty after 45 minutes of jury deliberation.
State of Colorado v. Jon E.All charges dismissed
See all legal cases 
School nameMajorDegreeGraduated
Platt & AssociatesCertificate of CompletionNHTSA/IACP Standardized Field Sobriety Tests Instructor Course2010
Platt & AssociatesCertificate of CompletionNHTSA/IACP Standardized Field Sobriety Tests Practitioner Course2009
University of Denver Sturm College of LawLawJD - Juris Doctor2005
University of Houston, Clear LakeBehavioral ScienceBS - Bachelor of Science2000
Speaking engagements
Conference nameTitleDate
Rocky Mountain High: DUI Defense School at 10,000 FeetBlood Draws: Mistakes, Issues, Defenses2011
Creative DUI/DUID DefenseChallenging the Forensic Blood Draw2009
Medical Center of Aurora Grand RoundsLegal Implications of Advanced Directives for Healthcare Professionals2004
Rural/Metro Ambulance Continuing Education SeriesHIPAA - The New Privacy Laws2003
Medical Center of Aurora Grand RoundsDo You Have Valid Consent to Treat?2003
Colorado State EMS ConferenceMedical Ethics and Avoiding Litigation2002