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Jose Carmelo Masso IV

also known as Sonny

About me

Languages spoken: English, Spanish

Practice areas


  1. Criminal Defense: 100%

Attorney endorsements

14 total 

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  • J Thomas Smith Ph.D.

    I endorse this lawyer.


    J Smith Immigration Attorney
    Relationship: Fellow lawyer in community

  • Christopher Daniel Leroi

    I endorse this lawyer. Mr. Casso is an incredible attorney who provides sage advice to all questions asked on Avvo. He is extremely knowledgeable and even though I have been practicing for 23 years as a judge, magistrate, and prosecutor, I learn from him every day.


    Christopher Leroi Mediation Attorney
    Relationship: Fellow lawyer in community

Contact info

Public Defender Office

210 W Temple St
Ste 19-513
Los Angeles, CA, 90012


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Pro Bono AwardLewis & Clark Northwestern School of Law2007
Moot Court: Mock TrialLewis & Clark Northwestern School of Law2007
HonorsOmicron Delta Epsilon2004
HonorsPhi Beta Kappa2004
Colwell Prize in American StudiesUniversity of Redlands2004
Work experience
TitleCompany nameDuration
AttorneyHorton Oberrecht Kirkpatrick & Martha2014 - 2015
Public DefenderCity of Renton/Auburn Public Defender2012 - 2014
Associate AttorneyMcElfish Law Firm2008 - 2012
Clerk/AttorneyLaw Office of Hugh Whittemore2007 - 2008
Rule 9 Law ClerkTyner & Associates2006 - 2007
Association namePosition nameDuration
Washington Association of Criminal Defense LawyersMember2012 - Present
U.S. District Court Eastern District of WashingtonMember2011 - Present
Washington State Bar Association, Criminal Law SectionMember2011 - Present
California State Bar, Criminal Law SectionMember2011 - Present
U.S. District Court Western District of WashingtonMember2011 - Present
Washington State Bar AssociationMember2010 - Present
U.S. District Court Eastern District of CaliforniaMember2009 - Present
Beverly Hills Bar AssociationMember2009 - Present
U.S. District Court Central District of CaliforniaMember2008 - Present
State Bar of CaliforniaMember2008 - Present
Orange County Bar AssociationMember2008 - Present
Legal cases
Case nameOutcome
Garcia v. Superior Court - Case No. E048874Writ of Mandate I prepared and aruged was granted in my client's favor.
Zamora v. Licea - San Bernardino Case No. CIVRS 702962Jury verdict in my client's favor.
Weathermon v. Zambrano - Case No. B240232Plaintiff's cause of action against my client dismissed by Court of Appeal
See all legal cases 
School nameMajorDegreeGraduated
Lewis & Clark Northwestern Law SchoolN/AJuris Doctor2007
University of RedlandsGovernment and EconomicsBachelor of Arts2004