Criminal Lawyer Walnut Creek

Law Office of Derek Ewin

Are you looking for an experienced DUI attorney in Walnut Creek? If you, or a loved one, are facing criminal charges we may be able to help.


Law Office of Derek Ewin handles all criminal cases.



Law Office of Derek Ewin provides legal representation in Walnut Creek and the surrounding area.

We are effective and aggressive and will work to help you get results that you need, from minor to major charges, at affordable rates.


If you are facing criminal charges, call our office now for a free case review (925) 262-8406

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If you have a legal question, concern, or would like to schedule a consultation simply fill out the form below.
If this is an urgent matter please call (256) 534-6222


Criminal Lawyer Walnut Creek

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 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.

Drunk Driving / DUI / DWI


If you have been arrested for Driving Under the Influence of Alcohol or Drugs (DUI), you could face a variety of serious penalties – including jail time and the suspension or revocation of your driver’s license. The severity of these penalties can depend on your blood alcohol level, your age, your prior record, whether you were involved in an accident, if you had minors in the car at the time and your manner of driving at the time of the arrest. In addition, the Department of Motor Vehicles (DMV) will seek to suspend or revoke your driver’s license irrespective of the result in criminal court. Some of these rights are time sensitive and require setting a hearing within ten (10) days of your arrest. Derek Ewin has literally handled hundreds of these types of cases. An experienced attorney, like Mr. Ewin, can help you navigate through the courts and DMV and greatly increase your likelihood of getting the best possible outcome.

Criminal Attorney Walnut Creek

Felony Crimes


A felony is a crime that can result in a sentence of more than one year in custody. There are many different crimes and kinds of conduct that can be charged as a felony. These crimes include things such as reckless evading, hit and run with injury, negligent burning, felony vandalism, threats, auto theft, serious felonies, violent felonies, and more. Some of these charges are called wobblers. Wobblers can be charged as either a felony or a misdemeanor. Derek Ewin has worked on all of these types of charges over his career. Over the last decade, he has had experience dealing with these types of cases as a felony filer, preliminary hearing deputy, trial team deputy and defense attorney. As a result of his experience, Derek Ewin knows how to best protect your rights and interests in these types of case, including how to work towards getting them reduced to misdemeanors.

Domestic Violence


Being charged with a Domestic Violence crime can have ramifications on your marriage, relationship with your children, freedom and employment. Derek Ewin spent four (4) years assigned specifically to the Domestic Violence Unit of the Contra Costa District Attorney’s Office. There he prosecuted cases ranging from minor threats to major shootings. He has also handled many of these cases as a defense attorney. He is well versed in the various charges and defenses involved in these types of cases. Often, if evidence can be presented to the District Attorney quickly, inappropriate charges can be prevented. So, hiring an attorney can be critical if you have been arrested. Derek Ewin knows how to best represent you in these types of cases.

Firearms and Weapons


There are various laws regarding firearms and other types of weapons. These laws can be so complicated and specific that often even law enforcement is not fully aware of the nuances. Derek Ewin has spent years studying these laws and their applications. Mr. Ewin knows what weapons are legal and what are not. He knows how to legally transport firearms and other weapons. So, if you have been arrested for carrying a loaded or concealed firearm, a dirk or dagger, for being a felon in possession of a firearm or for any other weapons related charge, Derek Ewin is the attorney who best knows your possible defenses.

Criminal Lawyer Walnut Creek

Drug Crimes - Controlled Substances


Drug charges are taken very seriously in California Courts. There is a wide range of possible sentences, from drug court to state prison. If you have been charged with a drug crime, an attorney can make all the difference in the world. Derek Ewin knows the drug laws, defenses and sentencing possibilities. He has handled a large range of cases from possession of paraphernalia, all the way to Sales and Transportation. He knows when treatment is an option and when it is not. If you have been accused of any of the following drug offenses, do not hesitate to contact Mr. Ewin to protect your rights.

  • Possession
  • Possession for Sale
  • Sale
  • Transportation
  • Use/Under the Influence
  • Manufacturing
  • Paraphernalia
  • Furnishing
  • Cultivation

Serious and Violent Crimes - Strikes


Serious and Violent Crimes in California are also known as “Strikes.” Conviction of one of these crimes can result in lengthy prison time and an increased sentence for any future felonies. In fact, prior convictions for two or more “Strikes” can lead to a sentence of life in prison for ANY new felony conviction. Prosecutors and Judges treat these crimes very seriously. Some offices even have Deputy District Attorneys assigned to solely prosecute “Three Strikes” cases. An experienced attorney like Derek Ewin can make all the difference in the world if you are currently, or if you have been in the past, charged with a Serious or Violent Felony. “Strikes” include crimes such as Residential Burglary, Robbery, Rape/Sexual Assault, Murder, Carjacking, Drive by Shooting, Assault with a Deadly Weapon, Grand Theft Firearm, any crime in which a Firearm is personally used, any crime in which Great Bodily Injury is inflicted and more.

  • Robbery
  • Residential Burglary
  • Use of a Firearm
  • Use of a Deadly Weapon
  • Infliction of Great Bodily Injury
  • Grand Theft Firearm
  • Kidnapping
  • Carjacking
  • Arson
  • Shooting from an Occupied Vehicle
  • Shooting at an Occupied Vehicle
  • Gang Crimes
  • Sex Crimes

Criminal Lawyer Walnut Creek

DEREK EWIN Criminal Lawyer Walnut Creek

Derek Ewin has a wealth of DUI and 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.



Derek Ewin
Criminal Lawyer Walnut Creek

201 N. Civic Dr.
Suite #225
Walnut Creek, CA 94596


(925) 262-8406





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Derek Ewin 201 N. Civic Dr.
Suite #225
Walnut Creek, CA 94596
(925) 262-8406 Mon-Fri 8:30a.m.-5:00 p.m. Or by appointment
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