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About Me

I believe that good lawyers are good problem solvers.  When someone hires me to represent them I consider it a sacred trust.  I take my job seriously because I konw how much is on the line.  Thank you for considering my profile, and I look forward to hearing from you and meeting you.


Languages Spoken: Spanish

Photos and Videos

92427 1362754888

92427 1270591807

Practice Areas


  1. Criminal Defense: 35%
    8 years, 1 thousand cases
  2. DUI & DWI: 25%
    12 years, 250 cases
  3. Violent Crime: 15%
    12 years, 500 cases
  4. Federal Crime: 15%
    7 years, 30 cases
  5. White Collar Crime: 10%
    10 years, 250 cases



Fixed (Always), Free Consultation (90 minutes)

Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

23 total 

  • Charles Edward Gold

    I endorse this lawyer. Well respected in the legal community. Hard working & dedicated to his profession and clients.


    Charles Gold DUI & DWI Attorney
    Relationship: Fellow lawyer in community

  • Brent R. Hardy

    I endorse Shannon wholeheartedly. I know him to be a superb attorney whose character is beyond reproach.


    Brent Hardy Criminal Defense Attorney
    Relationship: Fellow lawyer in community

Contact Info

Locke Law Group

1008 S. Alamo
San Antonio, TX, 78212

The Locke Law Group

15160 San Pedro
San Antonio, TX, 78232



TXEligible To Practice In Texas 200509/19/2015
AZAdministrative - Not authorized to practice200207/31/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
2012-2013 Rising StarScene in SA Magazine2013
A+ RatingBetter Business Bureau2012
2010 Mock Trial JudgeSt. Mary's University2010
Career Prosecutor CourseNational College of District Attorneys2004
Who's Who Among American Law StudentsSumma Publishing2000
Outstanding Law Student VolunteerVolunteer Lawyers Program of Arizona2000
Robert Moorehead Bankruptcy ScholarshipUniversity of Arizona2000
Work Experience
TitleCompany NameDuration
PartnerSifuentes & Locke2008 - Present
OwnerLaw Office of Shannon Locke2007 - 2008
Assistant District AttorneyBexar County District Attorney's Office2005 - 2007
Assistant County AttorneyPima County Attorney2002 - 2005
Law ClerkPima County Attorney's Office2000 - 2002
Account ManagerIKON Office Solutions1997 - 1999
Association NamePosition NameDuration
Texas Board of Legal SpecializationCriminal Law2012 - Present
Fifth Circuit Bar AssociationMember2012 - Present
Better Business BureauA+ Rating2012 - Present
State Bar of Texas- Criminal Justice SectionMember2009 - Present
Del Rio Federal Bar AssociationMember2009 - 2011
San Antonio Criminal Defense Lawyers AssociationMember2008 - Present
Texas Criminal Defense Lawyers AssociationMember2008 - Present
State Bar CollegeMember2008 - 2009
San Antonio Bar AssociationMember2006 - Present
Legal Cases
Case NameOutcome
State v. MMClient Acquitted of Murder
DWI High Breath TestNot Guilty
State v. SanchezNot Guilty
See all Legal Cases 
Publication NameTitleDate
San Antonio Criminal Defense AssociationEthical Fee Agreements2009
School NameMajorDegreeGraduated
University of Arizona College of LawLawJD - Juris Doctor2002
Macalester CollegeHistoryBachelor of Arts1996
School for International TrainingMexico Study Abroad ProgramN/A1995
Speaking Engagements
Conference NameTitleDate
Monthly Meeting Texas Association of Licensed InvestigatorsRole of Court Appointed Investigators in Criminal Cases2010
Weekly CLEEthical Fee Agreements2009