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About me

Our firm, Mastro Barnes and Stazzone, P.C. represents people accused of crimes. As a criminal lawyer, I get to go to court nearly every day and help people whose lives are sometimes in turmoil. The people we represent do not need a lecture from their attorney but sound and caring advice. We offer a helping hand.


Languages spoken: Spanish

Practice areas


  1. Criminal Defense: 65%
    28 years, 2 thousand cases
  2. DUI & DWI: 20%
    28 years, 500 cases
  3. Violent Crime: 10%
    28 years, 100 cases
  4. Speeding Ticket: 5%
    28 years, 500 cases



Fixed (sometimes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

23 total 

Are you an attorney? Endorse this lawyer

  • Miles America Cabral

    I endorse this lawyer. I had the pleasure of working with Steve on a Felony Sex Assault case where the offer was a lifetime prison sentence. Steve, using his calmness, professionalism, killer cross-examination skills, jury voire dire skills, and skilled preparation helped win the trial and give the client his life back. Very well practiced, well mannered, and extremely professional.


    Miles Cabral DUI & DWI Attorney
    Relationship: Worked together on matter

  • Mark Joseph Berumen

    I endorse this lawyer. Steve is an amazing attorney with years of experience. He is one of the hardest working attorneys I know. You cannot go wrong with Steve.


    Mark Berumen Bankruptcy & Debt Attorney
    Relationship: Fellow lawyer in community

Contact info

1720 S. Bellaire Street Suite 807
Denver, CO, 80222


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Client ReviewAmerican Institute of DUI/DWI Attorneys2015
Colorado Scholars Scholarship RecipientColorado Scholars Award1983
Work experience
TitleCompany nameDuration
PartnerFossum Mastro Barnes and Stazzone, PC1994 - Present
Deputy District Attorney17th Judicial Adams District Attorney's Office1992 - 1994
Deputy District Attorney16th Judicial District - District Attorney's Office1990 - 1992
Assistant Pro Se Law ClerkUnited States District Court Western District Missouri1987 - 1987
Association namePosition nameDuration
National Association of Criminal Defense LawyersN/A2015 - Present
Colorado Criminal Defense Bar AssociationMember2005 - Present
Colorado Bar Association - 16th Judicial DistrictVice President1991 - 1992
Adams/Broomfield Bar AssociationN/AN/A
Legal cases
Case nameOutcome
People v. BNot guilty all charges.
See all legal cases 
School nameMajorDegreeGraduated
University of Missouri - Kansas City School of LawLawJD - Juris Doctor1988
University of Colorado - DenverPolitical ScienceBA - Bachelor of Arts1984
Speaking engagements
Conference nameTitleDate
DCSO TrainingCross examination - Police witnesses2015
Colorado Criminal Defense Bar AssociationJury Selection2015