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About me

Jon M. Martinez is a criminal defense attorney who is determined to
fight for the rights of every one of his clients, whether they are
charged with shoplifting or first-degree murder. Mr. Martinez has shown
an outstanding understanding of the law mixed with excellent trial
skills and compassion for his clients. Mr. Martinez has used his skills
to obtain over 100 dismissals and not guilty verdicts in the past two
years alone.


Born and raised in Orange County, California, attorney Jon M.
Martinez graduated with high honors and attended the University of
Arizona to continue his education. At the University of Arizona, Mr.
Martinez earned a bachelor’s degree in political science and psychology
with honors.

Mr. Martinez then focused his energy on pursuing his lifelong
passion of attending law school.  Mr. Martinez scored in the 96th
percentile during the law school examination and eventually took a
scholarship offer to a top 20 law school at the Boston University
School of Law.  While going to law school, Mr. Martinez decided to
obtain his Master’s Degree from the nationally recognized Boston
University College of Communications and graduated with both a law
degree and a master’s from Boston University.  

Professional Development

Upon graduating from Boston University with a law degree and a
master’s degree, Mr. Martinez accepted a position at the Maricopa County
Attorney’s Office as a criminal prosecutor.  He quickly excelled as a
prosecutor and was the first in his class of more than 25 prosecutors
to move up to a trial group and also was the first to move up to a
Major Crimes division. As a Major Crimes prosecutor, Mr. Martinez was
in the Vehicular Crimes unit that is responsible for prosecuting all
felony crimes involving a vehicle and alcohol or drugs, including
prosecuting numerous Felony DUI cases as well as Aggravated Assault
with a Deadly Weapon, Manslaughter and Murder.

In February, 2008, Mr. Martinez decided to leave the Maricopa
County Attorney’s Office in order to join a criminal defense firm in
Arizona. While at this firm, Mr. Martinez honed his trial skills and
obtained numerous jury verdicts of Not Guilty and many more cases that
resulted in complete dismissal of the charges before trial.  Mr.
Martinez gained a reputation for being both an aggressive trial attorney
and one who genuinely cared about his clients.  He has handled a
variety of cases ranging from juvenile crimes, misdemeanor crimes and
all felony crimes including first-degree murder. 

After years at his previous criminal defense firm, Mr. Martinez
opened the Jon M. Martinez Criminal Law Group to allow him to give the
personal attention and superior defense that he believes every client
deserves.  Mr. Martinez is determined to work personally with every
client that walks into his office no matter the charges and he makes it
a personal goal to get the absolute best outcome possible for each and
every client.

The Jon M. Martinez Criminal Law Group

At the Jon M. Martinez Criminal Law Group, we are dedicated to
providing you with the absolute best possible defense for every client.
Attorney Jon M. Martinez will work with you every step of the way to
explain the legal process and help you through this traumatic and
stressful time in your life.  We believe that nobody should be defined
by their worst day and we will never treat you as just another case
number.  We will work to get to know who you really are as opposed to
who the police report says you are and we will do everything possible
to win your case.

For a free consultation, call the Jon M. Martinez
Criminal Law Group today at (480) 745-1572 or email attorney Jon M.
Martinez directly at


Languages spoken: English, Spanish

Practice areas


  1. DUI & DWI: 40%
  2. Criminal Defense: 40%
  3. Violent Crime: 10%
  4. White Collar Crime: 5%
  5. Juvenile: 5%



Retainer (always), Free consultation (60 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

21 total 

Are you an attorney? Endorse this lawyer

  • Ryan Spencer Tait

    Jon and I began our careers together at the Prosecutor's office. Early on, Jon developed the reputation of being a fearless, aggressive and effective advocate. His unabashed zeal for fighting in trial has produced tremendous results for his clients time and again.


    Ryan Tait Criminal defense Attorney
    Relationship: Worked together on matter

  • Jefferson M Simmons

    Jon has the knowledge and experience in DUI and criminal cases to get great results for clients. I endorse this lawyer.


    Jefferson Simmons DUI and DWI Attorney
    Relationship: Fellow lawyer in community

Contact info

Jon M. Martinez Criminal Law Group

40 N. Central Avenue
Suite 1400
Phoenix, AZ, 85048

Jon M. Martinez Criminal Law Group

40 N. Central Avenue
Suite 1400
Phoenix, AZ, 85004-4436



AZActive 200703/30/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Attorney of the MonthMaricopa County Attorney's Office2009
Attorney of the MonthMaricopa County Attorney's Office2008
Attorney of the MonthMaricopa County Attorney's Office2008
Work experience
TitleCompany nameDuration
AttorneyKnowles Law Firm, PLC2009 - 2011
Deputy County AttorneyMaricopa Country Attorney's Ofc2007 - 2009
Association namePosition nameDuration
American Bar AssociationMemberN/A
Major Crime’s Vehicular divisionMemberN/A
Maricopa County Attorney’s OfficeFormer ProsecutorN/A
American Association for JusticeMemberN/A
National Association of Criminal Defense LawyersMemberN/A
Legal cases
Case nameOutcome
State v. VelasquezNot Guilty
State v. WinterbothamNot Guilty
State v. ValdezNot Guilty After Trial
See all legal cases 
School nameMajorDegreeGraduated
Boston University School of LawLawJD - Juris DoctorN/A
Boston UniversityMass CommunicationsMasterN/A
University of ArizonaPolitical ScienceBS - Bachelor of ScienceN/A
University of ArizonaPsychologyBS - Bachelor of ScienceN/A