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Law Office of Derek R. Ewin
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Law Office of Derek R. Ewin
Derek Ewin

500 Ygnacio Valley Road, Suite 300
Walnut Creek CA 94596
(925) 262-8406

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Alt. Phone: (925) 209-6616

Law Office of Derek R. Ewin

Please Call : 925-262-8406

Former Contra Costa Prosecutor with Over 15 Years of Experience.

Welcome to the LAW OFFICE OF DEREK R. EWIN. We are looking forward to helping you negotiate the criminal justice system.

Our firm handles all criminal law cases, including Misdemeanors, Felonies and Drunk Driving/DUI for adults and juveniles, at any stage of the proceedings, including if

  1. you believe you are being investigated,
  2. you have been arrested,
  3. you have been charged,
  4. you have already been to court,
  5. you have violated probation,
  6. you want to clean up your prior record, or
  7. you are a victim or a witness and you feel you need representation.

Please contact us as soon as possible to set up your free consultation.

Your initial consultation is free.

Visa and Master Card are accepted.

Derek Ewin - Attorney Overview

Derek Ewin has a wealth of Criminal Law experience including more than thirteen years in County Prosecutors’ Offices. Eleven of those years Mr. Ewin worked as a Deputy District Attorney in Contra Costa County. As a Deputy DA, Mr. Ewin prosecuted thousands of cases, including but not limited to: Robbery, Homicide, Drunk Driving/DUI, Possession, Possession for Sale and Sale of Illegal Drugs, Three Strikes, Theft, Burglary, Auto Theft, Domestic Violence, Assault with Deadly Weapon, Illegal Firearms, Vandalism, Sex Crimes, Stalking, Gang cases, Arson and Drive By Shootings. At the DA's Office, Mr. Ewin worked in several divisions including Misdemeanors, Felony Trial Team, Calendar, Juvenile, Felony Filing, Domestic Violence/Sexual Assault, Preliminary Hearings and Homicide/Gangs. As a Criminal Defense Attorney, Mr. Ewin has handled numerous cases in the Greater San Francisco Bay Area. He has successfully defended misdemeanor, felony and drunk driving cases.

Mr. Ewin’s extensive experience includes Jury Trials, Court Trials, Preliminary Hearings, Motions to Suppress, Motions to Dismiss, Discovery Motions, Pre-trial Negotiations, Plea Bargaining, Sentencing Hearings, Probation Violation Hearings, Investigations, Mental Defenses, Victim Representation, DMV License Suspension Hearings and Post Conviction Reductions and Dismissals. He has also lectured in criminal law, legal updates and constitutional law to various local police agencies. In law school, Mr. Ewin focused on Criminal Law and Trial Practice. He tutored legal writing and competed in the National Moot Court competition.

Mr. Ewin has a reputation of integrity, honesty and skill with local prosecutors, defense attorneys, judges and court staff. Mr. Ewin works tirelessly to help his clients get their lives back in order and to get them free of the Criminal Justice System. Clients and Former Clients continually call and write to tell Mr. Ewin how his representation of them has changed their lives for the better.

Mr. Ewin was born and raised in the East Bay, where he continues to reside with his family. He is an avid dirt bike rider, wake-boarder, shooter and outdoorsman. He is also involved as a teacher at his local church.


University of California at Los Angeles
B.A. in Political Science

King Hall School of Law
University of California at Davis
Juris Doctorate


Yolo County District Attorney's Office
Certified Law Clerk

November 1993-January 1994
Ventura County District Attorney's Office

Contra Costa County District Attorney's Office
Deputy District Attorney

2005 - Present
Law Office of Derek R. Ewin


California State Bar – 1993
California Broker’s License - 2005


  • Drunk Driving/DUI
  • Theft/Petty Theft
  • Juvenile Cases
  • Drug Crimes
  • Burglary
  • Robbery
  • Homicide
  • Serious Felonies
  • Three Strikes Cases
  • Gang Charges
  • Violent Crimes
  • Weapons Charges
  • Sex Crimes
  • Domestic Violence
  • White Collar Crimes
  • Fraud
  • Misdemeanors
  • Felonies
  • Department of Motor Vehicles (DMV)
  • License Suspensions
  • Driving on a Suspended License
  • Dismissals/Expungement
  • Probation Violations
  • Parole Hearings
  • Sentencing
  • Victim/Witness Representation
  • Other Criminal Cases

    The Law Office of Derek R. Ewin serves clients throughout the San Francisco Bay Area, including Walnut Creek, Danville, San Ramon, Alamo, Concord, Pittsburg, Bay Point, Antioch, Brentwood, Richmond, Kensington, Martinez, Orinda, Lafayette, Oakley, Pinole, San Pablo, Clayton, Crocket, Pleasant Hill, Moraga, Discovery Bay, Kensington, El Cerrito, Hercules, El Sobrante, San Francisco, Oakland, Alameda, Benicia, Vallejo, Santa Rosa, Fremont, Dublin, Hayward, Pleasanton, San Mateo, Daly City, Pacifica, Petaluma, Rohnert Park, Redwood City, San Anselmo, San Bruno, San Carlos Napa, Sonoma, Vacaville, Fairfield, Albany, American Canyon, Livermore, San Leandro, San Rafael, Santa Clara, Sausalito, South San Francisco, East Palo Alto, Emeryville, Fairfax Union City, San Jose, Sunnyvale, Menlo Park, Bayside, Berkeley, Palo Alto, Foster City, Corte Madera, Half Moon Bay, Healdsburg, Larkspur, Mill Valley, Milpitas, Mountain View, Newark, Novato, Brisbane, Burlingame, Campbell, East Bay, Silicon Valley, and Napa Valley, as well as Contra Costa, Alameda, San Francisco, San Mateo, Solano, Napa, Santa Clara, Marin, Santa Cruz, Monterey, San Joaquin, Yolo and Sonoma counties.

    Please Call : 925-262-8406


  • Walnut Creek CA Criminal Defense Lawyer

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    Cities served:
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    Driving on a Suspended/Revoked License Reckless Driving Assault
    Breaking and Entering Possession of Drug Paraphernalia Leaving the Scene of an Accident
    Larceny/Theft Kidnapping Drug Possession
    Burglary Wire fraud Robbery
    Carjacking Battery Perjury
    Sexual assault Rape Sexual battery
    Prostitution Trespass Manslaughter
    Obscenity Domestic Violence Disorderly Conduct
    Criminal Sexual Conduct Criminal Confinement Conspiracy
    DUI / DWI Intimidation Lewdness
    Arson Possession of stolen property False Imprisonment
    Forgery Tax Evasion Securities Fraud
    Telemarketing Fraud Bribery Embezzlement
    Insurance Fraud Money Laundering Indecent Exposure
    Identity Theft Pyramid Schemes Fraud
    Habitual Traffic Offender Extortion Stalking
    Child Abuse Hate Crimes Homicide
    First Degree Murder Second Degree Murder Voluntary manslaughter
    Involuntary manslaughter Justifiable Homicide
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