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About me

I have practiced law for nearly 20 years. I am licensed in Missouri, Kansas and Colorado. The majority of my practice deals with criminal defense with a focus on drunk driving defense. 


I handle cases from the first time offender to serious felony cases.  I emphasize working with the client to help them understanding the law and how it applies to their situation. 


I aggressively fight to protect my clients rights and privileges. I will defend my clients through a trial if necessary.


Languages spoken: English, Spanish

Practice areas


  1. DUI & DWI: 40%
    18 years, 1.3 thousand cases
  2. Personal Injury: 30%
    21 years, 450 cases
  3. Criminal Defense: 30%
    18 years, 800 cases



Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

3 total 

Are you an attorney? Endorse this lawyer

  • Brian William Costello

    I endorse this lawyer.


    Brian Costello Criminal Defense Attorney
    Relationship: Worked together on matter

  • Michael S. Waddington

    I endorse Gregory. He is a highly skilled attorney that is well respected in the legal community.


    Michael Waddington Military Law Attorney
    Relationship: Fellow lawyer in community

Contact info

221 E. 11th Street
Kansas City, MO, 64106

416 Main Street
Belton, MO, 64012



KSAuthorized to practice law199510/12/2015
MOGood Standing, Active199401/08/2013
COAdministrative - Not authorized to practice199610/31/2015
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
BV RatedMartindale-Hubbell2014
Work experience
TitleCompany nameDuration
Managing PartnerAbella & Gunter, LLC1998 - 2000
AttorneyDaniel Allmayer, P.C.1997 - 1998
AssociateWiiliam H. Picket, P.C.1994 - 1997
Association namePosition nameDuration
National Association of Criminal Defense LawyersMember2000 - Present
Kansas Bar AssociationMember1995 - Present
Colorado Bar AssociationMember1995 - Present
Kansas City Metropolitan Bar FoundationMember and Former Committee Chairman1994 - Present
Missouri State Bar AssociationMember1994 - Present
Legal cases
Case nameOutcome
State of Missouri v. JimenezProbation
See all legal cases 
School nameMajorDegreeGraduated
University of Denver Sturm College of LawLawJD - Juris Doctor1994
Creighton UniversityBiology and PsychologyBS - Bachelor of Science1986
Georgetown University Law CenterN/AN/AN/A