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About me

Dan is a founding partner at the law firm of Carpenter & Mayfield.  He has over thirty years experience including death penalty cases.  Dan has been the recipient of many awards and is recognized throughout the legal community as a tireless advocate for his clients.  He has handled more than two thousand cases, nearly one hundred jury trials (including two trials that lasted more than a year each), and has devoted nearly his entire practice to serving the people of Santa Clara County.


Practice areas


  1. Criminal Defense: 90%
    34 years, 1.8 thousand cases
  2. Appeals: 5%
    34 years, 300 cases
  3. Military Law: 3%
    37 years, 100 cases
  4. Juvenile: 2%
    34 years, 100 cases



Hourly ($360/hour)

Payment types:

Cash, Check, Credit card

Attorney endorsements

8 total 

Are you an attorney? Endorse this lawyer

  • Richard Alan Wingerden

    I endorse this lawyer. I have had the opportunity to witness his work in the courtroom and have found him to be diligent and hardworking. He is well respected in the legal community.


    Richard Wingerden Criminal defense Attorney
    Relationship: Fellow lawyer in community

  • Steven Hideki Nakano

    I endorse this lawyer. I have known Dan Mayfield for many years. We have handled many co-defendant cases together, including a case where we represented Stanford Students who advocated divestiture of Stanford's investment portfolio in companies doing business with South Africa during Apartied. Dan is a tenacious lawyer, principled advocate and teacher. All of these wonderful qualities are what make Dan Mayfield a great and successful lawyer.


    Steven Nakano Criminal defense Attorney
    Relationship: Fellow lawyer in community

Contact info

730 N 1st St
San Jose, CA, 95112


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Association namePosition nameDuration
National Lawyers Guild (San Francisco chapter)N/AN/A
American Civil Liberties UnionN/AN/A
California Attorneys for Criminal JusticeN/AN/A
Legal cases
Case nameOutcome
People v. MaysReversed for retrial
In re Alex N. 132 Cal App 4th 18Reversed twice for resentencing
People v. Vargas 91 Cal App 4th 506Pending
See all legal cases 
Publication nameTitleDate
Guild PractitionerEric Clapton and Closing Argument2009
School nameMajorDegreeGraduated
University of CaliforniaN/AOther - BachelorsN/A
People's College of LawN/AJD - Juris DoctorN/A