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Mark Lawrence Deniz

also known as Law Office of Mark Deniz APLC., San Diego DUI Attorney Lawyer

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About me

Former Veteran Prosecutor dedicated to Criminal Defense who works tirelessly with efficiency.

 Deniz is a native of Southern California.  He earned a scholarship playing college football. He earned the honor of Academic All-American.


After college he spent a few years as a high school educator and a varsity football coach.  He then followed his dreams and attended law school.  During law school he focused on helping people navigate through the legal system. He had internships with Prisoner Legal Services, Marin County Counsel, and Contra Costa Senior Legal Services. 


In January 2004, he joined the ranks of the District Attorney’s Office.  There, he learned behind-the-scene intricacies of criminal prosecution and was quickly promoted to Deputy District Attorney IV. Mr. Deniz worked closely with law enforcement. He went on ride-a-longs with police offices, reviewed police reports, filed criminal charges, negotiated plea bargain deals, interviewed expert witnesses and successfully tried more than 50 jury cases. He received training in evidence, trial technique, and felony sentencing from the California District Attorney Association.


In March 2009, he became a Deputy at the San Diego City Attorney’s Office.  As a Deputy City Attorney he spent time in several units including the Domestic Violence, Issuing, and general trial unit.  In 2012, he tried 13 jury trials alone.  He was Prosecutor of the Month for September 2011 and November 2012. He has conducted over 70 jury trials as well as hundreds of motions and hearings.  He handled thousands of cases while with the City Attorney’s office alone.


Mr. Deniz learned the prosecution's side of the law from the inside out, with all its strengths and weaknesses.  This is unique and vital knowledge for a defense attorney. Preferring private practice and being well-armed with first-hand experience in the District Attorney's office and the City Attorney’s office, Mr. Deniz opened his own practice, focusing on San Diego DUI and San Diego criminal cases.  With his depth of experience, he knew there were better ways to get favorable results besides the generic, impersonal approach often found in big law firms, and those without the knowledge of the inner workings of the prosecution.


Mr. Deniz opened his own law firm to satisfy clients' needs for individualized, professional services, tailored to give a quality defense that has reasonable and realistic fees.

At the Law Offices of Mark Deniz, Mr. Deniz provides his personalized, aggressive litigation expertise to each and every case. Your case will not be assigned to a junior-level associate. By handling the cases himself, Mr. Deniz provides his clients with top-shelf attention.  Criminal Law has many attended and unintended consequences; you must have quality representation. You have to try your best to get out of an unsympathetic and complex system.

Mark Deniz is active and up-to-date within the legal community.  This includes:


·               Attended the prestigious National Advocacy Center in Columbia, South Carolina.

·               Member of California DUI Lawyers Association

·               Member of National College of DUI Defense

·               Member of San Diego Criminal Defense Bar

·               Member San Diego County Bar Association


Mr. Deniz also sits on several consulting and referral panels throughout San Diego County.


Some other tidbits about Mr. Deniz include:


·               Former Special Prosecutor for the Auto Theft task force

·               Was Prosecutor of the Month in San Diego for September 2011 and November 2012.

·               Former member of the California District Attorney’s Association

·               Respected by judges, court staff, prosecutors, and his colleagues in the criminal defense bar.

·               Mark graduated from the prestigious and rigorous National College of DUI Defense Summer Session, held at Harvard Law School in Cambridge, Massachusetts.

*             Graduated from La Pier’s rigorous DWI Detection and Standardized Field Sobriety Testing course; he is certified in Standardized Field Sobriety Tests under NHTSA (National Highway Traffic Safety Administration).



Languages spoken: English, Spanish

Photos and videos

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Practice areas


  1. DUI & DWI: 80%
  2. Criminal Defense: 20%
    12 years, 9 thousand cases



Fixed (sometimes), Retainer (always), Free consultation (30 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

65 total 

Are you an attorney? Endorse this lawyer

  • Todd Daniel Zocchi

    Mark has exceptional knowledge and experience in criminal law, having done numerous jury trials as a prosecutor. Mark thoroughly evaluates the strengths and weaknesses of his cases and his opponents. He also thinks outside of the box when necessary for his cases. Mark is respected in the legal community.


    Todd Zocchi Government Attorney
    Relationship: Co-worker

  • Matthew Ian Terry

    Simply put, Mark Deniz is a legal specimen. From the opposite side of the courtroom to watching him work as a defense attorney, one thing is clear: he has an approach to lawyering that is unparalleled. His systematic, relentless preparation is unlike anything I've ever seen. The novelty of his ideas are far beyond the typical "textbook defense" approach that we see all too often (to the client's detriment). The prosecution simply cannot keep up with him. Mark Deniz is seven moves ahead on the chessboard and it's an absolute privilege to watch this attorney unfold his game-plan. He has literally re-invented the game. To use a sports analogy, Deniz is, frankly, the Billy Beane of criminal defense. Game-changer. Highest recommendation I can give an attorney.


    Matthew Terry DUI and DWI Attorney
    Relationship: Worked together on matter

Contact info

Law Offices of Mark Deniz

2831 Camino Del Rio South
Suite 307
San Diego, CA, 92108

205 West 5th Avenue
Suite 104
Escondido, CA, 92025



We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
A Rating Better BusinessAVVO2015
AVVO ContributorAVVO2015
Superb RatingAVVO2015
AVVO Clients Choies AwardAVVO2015
Top 10 Attorney Award for the State of CaliforniaNational Academy of Criminal Defense Attorneys2014
Top 100 Trial LawyersNational Trial Lawyers Association2014
Clients Choice-San DiegoAVVO2014
SFST Student Course GraduateLa Pier & Associates2013
Superb RatingAVVO2013
Summer Session GraduateNational College for DUI Defense2013
Certification Qualified Standardized FST AdministrationLaPier per National Highway Transportation and Safety Administration and International Association of Chiefs of Police2013
Deputy City Attorney Criminal Prosecutor of the MonthSan Diego City Attorney-Criminal Division-Trial Unit2012
Deputy City Attorney- Criminal Prosecutor of the MonthSan Diego City Attorney-Criminal Division-Trial Unit2011
Criminal law Mock Trial ChampionCounty of Tulare Bar Association2008
Criminal Law Trial - California DelegateUnited States Department of Justice-Criminal Trial Advocacy Center, Columbia, South Carolina2006
Work experience
TitleCompany nameDuration
Owner & OperatorLaw Offices of Mark Deniz APLC2013 - Present
Deputy City AttorneyCity Of San Diego, Criminal Division2009 - 2013
Deputy District AttorneyTulare County District Attorney's Office2004 - 2009
Certified Law ClerkContra Costa Senior Legal Services2000 - 2003
Law ClerkMarin County Counsel1999 - 1999
Law ClerkSan Francisco County Sheriff Department- Prisoner Legal Services1998 - 1998
Association namePosition nameDuration
Duey Dialer National DUI AppPanel member for San Diego County2015 - Present
National Academy of Criminal Defense AttorneysMember2014 - Present
National Trial Lawyers AssociationMember2014 - Present
Attorney Search NetworkOfficer/Panel Member2013 - Present
SDBA Lawyer Referral PanelPanel Member2013 - Present
University City Little leagueOfficer2013 - Present
San Diego Bar AssociationAttorney Member2013 - Present
National College of DUI DefenseAttorney Member2013 - Present
Criminal Defense Bar Association of San DiegoAttorney Member2013 - Present
California DUI Lawyers AssociationAttorney Member2013 - Present
State Bar of CaliforniaMember2003 - Present
Deputy City Attorney Association San DiegoAttorney Member2009 - 2013
National College of District AttorneysAttorney Member2004 - 2013
California District Attorneys AssociationAttorney Member2004 - 2009
Legal cases
Case nameOutcome
People v. RWet Reckless
People v. MNo Custody, no interlock and trash pick up
People v. BNo Custody
See all legal cases 
Publication nameTitleDate
Defense DUI BlogBe Afraid this Halloween of a DUI Arrest2015
San Diego Premier Defense BlogSan Diego Minor in Possession Charge 101 BP 25662 (a)2015
San Diego Premier Defense BlogSan Diego DUI & Minors and Those Under 21 Years Old2015
San Diego Premier Defense BlogHow a San Diego DUI Can Affect a Nurse2015
San Diego Premier Defense BlogSan Diego First Time DUI Education Programs2015
San Diego Premier Defense BlogWhat Does It Mean To "Submit" At A San Diego DUI Checkpoint?2015
San Diego DUI BlogSan Diego DUI and Medical Licenses for Doctors2014
San Diego DUI BlogHow a San Diego DUI Affects Pilots Licenses and Certificates for Airline Pilots2014
San Diego DUI BlogHow Does a San Diego DUI Conviction Affect a Real Estate Agent2014
San Diego DUI BlogHow a San Diego DUI Affects Truck Drivers2014
San Diego DUI BlogHow Does a San Diego DUI Conviction Affect Teachers2014
Presumed Innocent MagazinePresumption of Innocence versus the Presumption of Guilt2014
Presumed Innocent MagazineA client needs to be honest with their attorney and themselves2014
Voice of San Diego NewspaperYes, checkpoints are legal2014
San Diego DUI BlogDefendant's Can't Challenge Reliability of Breathalyzers2014
The San Diego Criminal LawyerCan an officer pull you over for weaving within a lane?2014
San Diego ExpungeExpunging your DUI2014
Criminal Defense BlogSan Diego Expungements and Termination of Probations2014
CriminologySocial Media & Criminal Defense2012
San Diego Union TribuneParolee Marc Duncan Sentenced2012
SDCACriminal Restitution 1012011
Channel 10 news legal affairsSDPD Probe into arrest2011
San Diego City Attorney BriefSpotlight: Mark L. Deniz, Esq2009
Tulare County District AttorneyStrathmore Man Convicted of Carjacking2008
Tulare County District Attorney16 year old Michael Curtis of Exeter found guilty of Carjacking, Robbery, and Assault with a deadly weapon2008
The RecorderKeeping Seniors Safe in their homes2001
San Diego DUI BlogSan Diego DUI and How It Affects a Professional License for a NurseN/A
School nameMajorDegreeGraduated
National College of DUI DefenseN/AHarvard Law School Summer Session2013
La Pier and Associates National Highway & Safety testingN/ANHTSA Certificate on Field Sobriety testing2013
California District Attorneys AssociationN/ACertificate of Completion in Tech Issues in Criminal Prosecution2008
California District Attorneys AssociationN/ACertificate of Completion in Asset Forfeiture2007
California District Attorney AssociationN/ACertificate of Completion in Felony Sentencing2007
United States Department of Justice National Advocacy CenterTrial Advocacy CollegeCertificate of Completion2006
California District Attorneys AssociationN/ACertificate of Completion in Insurance fraud2005
California District Attorneys AssociationN/ACertificate of Completion in DUI Investigations2004
John F. Kennedy University School of LawLawJD - Juris Doctor2002
Northern Arizona UniversityPolitical ScienceBachelor Science1995
Speaking engagements
Conference nameTitleDate
NBC NewsSan Diego DUI Checkpoint Video2015
Media Law Solo PracticeSDSU Media Law Panel2015
Trial Defense, criminal defenseDUI Defense2014
Student Athlete Academic ServicesPractical Law for young adults2014
Student Athlete Academic DeptBecoming a Lawyer2014
Special Speaker EventHaving Passion while practicing law2014
San Diego DUI Defense AssociatesCLE- Penalties for multiple DUIs2013
CLE-DUI TrainingCLE-Rising blood alcohol & using the See Saw2013
CLE-DUI Law GroupCLE Weaving DMV Suspensions in your DUI Defense2013
CLE- San Diego DUI AttorneysCLE- Working with your Criminaist2012
CLE DUI TrainingCLE The four phases of a DUI2012
Career Development for Student AthletesAvoiding criminal trouble during college2012
CLE-Lifeguard Officer TrainingCLE-Law Enforcement report writing2011
CLE- Criminal Law GroupCLE Criminal Restitution 1012011
CLE Felony Law ReviewCLE Cross Examination of a DUI witness2011
Introduction to LawJury Trial Preparation2009
Criminal Trial LawyersCLE Cunningham and Motive2009
CLE - Tulare County District AttorneyCLE How to Proof up a Drug Preliminary Hearing in 7 quesions2009
Crime preventionStaying out of trouble during college2008
CLE - Tulare County District AttorneyCLE - Grand theft auto PC 10851(a)2008
CLE - Tulare County District AttorneyCLE - Techniques in Voir Dire2008
CLE - Tulare County District AttorneyCLE - How to prove up a drug charge2007
CLE - Tulare County District AttorneyCLE - Closing Arguments2007