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About me

I have dedicated myself to representing people who have been accused by the state of committing a crime. I specialize in DUI defense and Criminal Defense from misdemeanors to felonies.


I graduated magna cum laude from Regis University with degrees in both Political Science and Philosophy. From there, I attended the University of Colorado School of Law, graduating in 2000.


I started my career as a Deputy District Attorney in Arapahoe and Douglas counties. As a prosecutor, I quickly went from working on DUIs to a county court supervisor. Later, I worked in the juvenile division before being promoted to District Court, where I prosecuted all levels of felonies from simple drug charges to homicide. I tried jury trials on nearly a weekly basis and developed the trial skills needed to represent an individual against the power of the state. The District Attorney’s Office recognized me with the first ever Trial Energy Award. During this time, I also learned a great deal about how prosecutors approach cases and how and why they take tough stances or make better offers.


Before I dedicated myself to the defense of the criminally accused, I spent an additional year of handling complex civil cases on the behalf of insurance companies in both state and federal court. This time in my life taught me how to best manage my time and deal with large, complex cases for my client. However, after approximately a year, I decided that I didn’t go to law school to represent nameless corporations, but to protect individual people.


For the last six years, I have dedicated myself to representing individuals accused by the state in all criminal matters. At my previous law firm, I had the opportunity to litigate and fight thousands of DUI cases in both court and the DMV. I am happy and proud to say that my previous firm, Fife, Mangnall & Mossinghoff, P.C., was, without a doubt, one of the best DUI firms in the metro area. I also had the opportunity to focus a substantial part of my practice to focus on felony defense as well. However, the opportunity to create Mossinghoff Mangnall, P.C. was such an opportunity for me as well as my future clients, I could not resist.


I am proud to be a co-founder of Mossinghoff Mangnall, P.C. with Darin Mangnall. With our combined 22 years of trial experience, we have literally tried hundreds of jury trials.  We have the experience and confidence to fight for you in court--no matter if you are charged with a felony, a DUI or any criminal matter. We are also dedicated to keeping open and honest communication lines with our clients. Contact Darin or myself now so that we can discuss your case as soon as possible; 303-502-5816 or email us at or


Photos and videos

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Practice areas


  1. DUI & DWI: 75%
  2. Criminal Defense: 25%



Free consultation (45 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

15 total 

Are you an attorney? Endorse this lawyer

  • Philip Marshall Clark

    I strongly endorse this lawyer. I have observed his work for many years and I worked with him at one time. He is a top legal talent and possesses an excellent reputation in the legal community.


    Philip Clark DUI and DWI Attorney
    Relationship: Fellow lawyer in community

  • Matthew Patrick Hand

    Exceptional lawyer, very experienced and trustworthy. Easy to talk with and sincere, Having worked on the other side of cases from him, and having seen some of his work for the defense community, I imagine he does an excellent job for all his clients.


    Matthew Hand Domestic violence Attorney
    Relationship: Fellow lawyer in community

Contact info

Mossinghoff Mangnall, P.C.

36 South Steele Street, Suite 200
Denver, CO, 80206


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarSuperLawyers2014
Top 10 Colorado Attorney under 40National Academy of Criminal Defense Attorneys2014
Rising starSuperlawyers2013
Trial Energy Award18th Judicial District Attorney's Office2002
Work experience
TitleCompany nameDuration
AssociateFife, Mangnall & Mossinghoff, P.C.2005 - 2011
Civil litigator and trial attorneyCross & Sands, LLC2004 - 2005
Deputy District Attorney18th Judicial District Attorney's Office2000 - 2004
Association namePosition nameDuration
National College of DUI DefenseMember2013 - Present
Colorado Criminal Defense Bar AssociationMember2005 - Present
Arapahoe County Defense BarMember2005 - Present
Colorado Bar AssociationMember2000 - Present
Legal cases
Case nameOutcome
People v. JMNot Guilty of DUI, DWAI and Reckless Driving; Guilty of Careless Driving
People v. TrujilloNot Guilty of Original Counts, Guilty of a Class 4 Felony
People v. AMNot Guilty of all charges.
See all legal cases 
Publication nameTitleDate
Colorado DUI Defense ManualDUI-D Overview2015
Trends in DUI Discovery (Inside the Minds)Science Remains on Defense's Side in DUI Cases2014
School nameMajorDegreeGraduated
University of Colorado School of LawLawJD - Juris Doctor2000
Regis UniversityPolitical Science, PhilosophyBA - Bachelor of Arts1996
Speaking engagements
Conference nameTitleDate
NCSL Legislative SummitLegalizing Marijuana: Potholes and Possibilities2015
Issues in Criminal Defense CLEDefending Drugged Driving Cases2015
Colorado DUI Basics Seminar: A nuts and Bolts ApproachA Primer for Defending DUID cases: How the West Was Won2014
Colorado County Court CLECrosstown Traffic2014
Criminal Law for ParalegalsIntroduction to Criminal Law2012
CCDB Appeals for Dummies and the Not so DumbAppealing County Court Cases2011
Restitution in Criminal LawRestitution in Criminal Law2003
Law Enforcement TrainingArrest & Investigation Procedures for Domestic Violence2001