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About me

       Mark Beller is former Prosecutor with both the City of Scottsdale and The Maricopa County Attorney's Office.  He has spent his entire career practicing criminal law.  He is a veteran trial attorney with a proven record of sucess.


        Mr. Beller is a graduate of The University of Arizona and he received his law degree from Arizona State University College of Law. While in school he worked as an intern for the Maricopa County Prosecutor’s Office and the Pima County Public Defender’s Office. After Mr. Beller was admitted to the Arizona Bar, he practiced for five years as a Deputy County Attorney with the Maricopa County Attorney’s Office. While with the Maricopa County Attorney’s Office, he served in several trial divisions including as a mentor in charge of supervising and training new prosecutors.

      After leaving the MCAO, Mr. Beller practiced as an Assistant City Prosecutor for the City of Scottsdale. During his six years as a Scottsdale Prosecutor, his practice was focused on driving under the influence cases as well as the specialized areas of juvenile law, commercial trucking enforcement, and retail liquor law violations. Mr. Beller has extensive experience in all areas of Criminal Law including the areas of driving under the influence and drug offenses.



Photos and videos

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Practice areas


  1. DUI & DWI: 60%
    15 years
  2. Criminal Defense: 40%
    15 years



Free consultation (120 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

30 total 

Are you an attorney? Endorse this lawyer

  • Joshua M Blumenreich

    I endorse this lawyer.


    Joshua Blumenreich DUI and DWI Attorney
    Relationship: Fellow lawyer in community

  • Arthur J Hall

    I first met Mark when he was a prosecuting attorney for several DUI cases. He was very effective at his duties as a prosecutor and I have come to know his skills even more now that he is defending those cases. He is well liked by his clients because he is diligent and obtains some incredible results for his clients. I endorse Mr. Beller.


    Arthur Hall DUI and DWI Attorney
    Relationship: Fellow lawyer in community

Contact info

Rosenstein Law Group, PLLC

8010 E. McDowell Rd. Ste. 111
Scottsdale, AZ, 85257

Rosenstein Law Group

633 East Ray Road
Gilbert, AZ, 85296

Rosenstein Law Group

1616 East Indian School Road
Phoenix, AZ, 85016

Rosenstein Law Group

101 E. 1st Ave
Suite 208
Mesa, AZ, 85210



AZActive 200207/06/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Top 100 DUI Attorneys in ArizonaNational Advocacy for DUI Defense2015
Nominated "10 Best Attorneys in ArizonaAmewrican Institute of Criminal Law Attorneys2015
10 Best Attorneys in ArizonaAmerican Institute of DUI/DWI Attorneys2014
Recognized as One of Arizona's Finest LawyersArizona's Finest Lawyers2014
5 Year Service AwardCity of Scottsdale2012
Dedicated Service AwardOffice of the Maricopa County Attorney2005
Work experience
TitleCompany nameDuration
Defense AttorneyRosenstein Law Group, PLLC2013 - Present
Defense AttorneyThompson and Volquardsen2012 - 2013
Prosecuting AttorneyCity Of Scottsdale2006 - 2012
Prosecuting AttorneyMaricopa County Attorney's Ofc2002 - 2006
Prosecution InternMaricopa County Attorney's Ofc2001 - 2002
Association namePosition nameDuration
National College of DUI DefenseMember2015 - Present
Arizona Attorneys for Criminal JusticeN/A2014 - Present
National Association of Criminal Defense LawyersN/A2014 - Present
State Bar of ArizonaMember2002 - Present
Legal cases
Case nameOutcome
DUI in Scottsdale City CourtDUI charges dropped
DUI in West MesaDUI dismissed, plead to Reckless Driving
Marijuana For SaleProbation with no jail
See all legal cases 
Publication nameTitleDate
RLG Criminal Defense BlogBreath vs. Blood in a DUI Investigation2014
RLG Law BlogDUis on Electric Bikes2014
Maricopa County Attorney Training and DevelopmentGuide to Maricopa Justice Courts2005
Maricopa County Attorney Training and DevelopmentPreliminary Hearing Essentials2004
School nameMajorDegreeGraduated
Aggressive Defense of Accused Impaired Driver SeminarN/ACert.2015
National College for DUI DefenseN/AMetrology: Science as the Best Defense2014
The Art and Science of DUI DefenseN/ACert.2012
Arizona State University Sandra Day O'Connor College of LawLawJD - Juris Doctor2001
University of Arizona College of LawHistory, Political ScienceBA - Bachelor of Arts1995
Speaking engagements
Conference nameTitleDate
ABC NewsDUI Checkpoints2016
Valley Youth ConferenceUnderstanding Your Rights When Stopped By Police2013
Maricopa County Training and DevelopmentProsecutorial Hammers: Understanding Allegations in Plea Offers.2005
Maricopa County Attorney Training and DevelopmentOnline Investigative Resources For The Criminal Justice System.2005
Maricopa County Attorney Training and DevelopmentFundamentals of Plea Writing in RCC2004