Skip to main content

Derek Richard Ewin

Criminal defense Attorney at Walnut Creek, CA

5.0   23 reviews
  • Licensed for 30 years
    State CA
    Acquired 1993
    Active No misconduct found

We have not found any instances of professional misconduct for this lawyer.

About Derek

Learn Derek’s areas of practice.

Practice areas
  1. Criminal defense

    31 years, 1,000 cases

  2. DUI and DWI
    I represent both ADULTS and JUVENILES in DRUNK DRIVING CASES in both the COURTS and the DMV

    31 years, 1,000 cases

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.

Photos and videos


Law Office of Derek R. Ewin
201 North Civic Drive
Suite 225
Walnut Creek, CA, 94596

Similar lawyers nearby


5.0 / 5.0
  23 customer reviews
5 Star
4 Star
3 Star
2 Star
1 Star
Posted by Rhonda | April 18, 2022
This review is from a person who hired this attorney.
| Hired Attorney
Best lawyer in the world very confident professional .
Derek work very hard on my case and I love him for that couldn't have had a better lawyer he is the best thank you Derek for all that you do
Posted by anonymous | December 30, 2016
This review is from a person who hired this attorney.
| Hired Attorney
There were several factors that I considered when hiring an attorney to represent me for a DUI charge, which included being local, having extensive experiences with DUI cases, understanding his fees, and most importantly, treating me with dignity. Mr. Ewin previously worked for the Contra Costa County DA office, and this experience and his connections was necessary given that I do not reside in the Bay Area. I decided to contact Mr. Ewin after doing extensive research about where he went to law school (UC Davis), types of cases he represents, and reading many of the online reviews. Several consistent themes emerged from his online reviews that prompted me to consult him: he is personable, aggressive, well connected, knowledgeable, and handles cases with the utmost professionalism and dignity. During consultation over the phone, Mr. Ewin explained in layman’s terms the paralleled process of the criminal court and DMV administrative hearing for DUI cases. He then interviewed me about my personal background and ascertained the facts of my case, which led to his advice about the best way to proceed. After this consultation, I decided to hire Mr. Ewin. The first thing he did was schedule the DMV administrative hearing to coincide with my court date, which allowed me to drive for three months legally. Next, he represented me at the initial court hearing that I was unable to attend. After the initial court hearing, Mr. Ewin negotiated with the DA’s office to reduce the charges. It is necessary to understand that Mr. Ewin was upfront and never promised me an outcome, but suggested based on his knowledge and experience he would aggressively work with the DA’s office to get my charges reduced. Mr. Ewin prepared me for the second court hearing by walking me through the documents and what I should expect. He made sure I understood the legal ramifications of my options. The morning of my second court case, Mr. Ewin was able to move my case to the front of the docket even though scheduled for a later time. While in court, I understood how important it was to have hired Mr. Ewin. Other folks in my situation were meeting their court-appointed attorneys for the first time. In fact, I was astonished to bear witness to one court-appointed attorney publicly call her clients by their names, introduce herself, and briefly talk to them about their cases for the first time. Also, while in court, Mr. Ewin called DMV to see if they had made a decision about my case. Mr. Ewin successfully got my DUI charges reduced to wet reckless. As a result, I paid lower fines, and the court did not suspend my license. Although I did not win the DMV administrative hearing (from what I have read and confirmed by Mr. Ewin only 9 – 10% of cases are won), Mr. Ewin aggressively argued my case based on a discrepancy he found in the police report. I highly recommend Mr. Ewin if you are seeking a talented, aggressive, well-connected, and personable attorney to represent you in a DUI case.
Read less
Posted by David | March 25, 2016
This review is from a potential client who consulted with this attorney.
| Consulted Attorney
Excellent attorney
Derek is one of the most dedicated, hardworking,ethical attorneys I have had the pleasure of working with. He is a forceful advocate for his clients and a formidable adversary.
Posted by Jason L Skerik | March 17, 2016
This review is from a person who hired this attorney.
| Hired Attorney
Mr Ewin kicks ass . He not only understands my needs he demonstrates his ability to go above what is expected by doing simple things like going and interviewing my partner in jail before he accepted a dime from me . He worked with me on payments , and did not make any promises that were unrealistic .
Posted by Aurora | February 10, 2015
Derek Ewin
Derek Served our family excellently and I would recommend him and his services to anyone I know. We recently needed an attorney for a serious family issue and was nervous about who to contact to guide us through the legal process. I came across Dereks website and gave him a call. He personally answered the phone and after hearing his voice and a brief conversation I felt we had made the correct choice in attorneys. He was very knowledgeable but also very easy to speak with and addressed every question we had and was available when every we needed him. He was a blessing when we needed it the most and he has brought peace of mind back into our home. I would highly recommend him to anyone I know who needs the services that he provides.
Read less
Posted by anonymous | December 15, 2014
Miracle Worker
Third DUI. No jail time! Impossible, right? Not only did Derek believe in me from the beginning but he worked tirelessly to ensure that I got the best possible deal. His knowledge of the process and hands on experience with the DA's office are the key differentiators that make him THAT GUY! You know, the guy who turns your life around, makes you want to be the best you can be and does it with a great attitude, one that is always frank but positive and no nonsense. I feel fortunate that I found Derek.
Read less
Posted by Nicholas | September 22, 2014
I spoke with several attorneys concerning a d.u.i. case. Derek was very honest and calming, in what could have been a disaster in my life. . He handled everything with integrity as if he was defending himself. .
Posted by Danville Mom | September 18, 2014
Great Background, Exceptional Person
I am so very grateful to have found Derek through a Google search. My daughter was in a desperate situation and needed help. We could not have found a more perfect person for the situation. I hired the impressive background, but got so much more. The first time Derek walked into court, it was apparent that people knew and really liked him. I believe it is the long-cultivated relationships that went a long way toward the incredible resolution he was able to obtain. As important to me, as a mother of a young girl, was the immediate bond Derek formed with my daughter. She liked his integrity and the rules he had for working with him. He inspired her to step up and change her life. Derek was as responsible for her change in attitude and decision-making as anyone else attempting to help her. Throughout this brief relationship, I've been impressed by Derek's honesty, compassion, communication skills, strategic thinking and consideration for everyone involved. I could not have found a better attorney or a more impressive human being. I cannot recommend anyone more highly than I wholeheartedly recommend Derek.
Read less
Posted by Brian | July 13, 2014
Very fair outcome.
Derek Ewin is everything these reviews say. He is honest, fair and was able to negotiate the best possible outcome for my case. Mr Ewin handled every detail to make sure that as long as I keep up my end of the deal, I would be given the chance to provide for my family and make the right decisions in the future. Derek was definitely the right choice of attorney.
Read less
Posted by anonymous | June 2, 2014
First experience with a legal issue
Was very open and forthright when discussing the issue brought to him, which is appreciated - it's easier to handle a situation when you know what it is from the beginning.
Posted by Kristina | May 14, 2014
Highly Skilled Attourney
First I would like to start by saying I am beyond impressed with Derek's skill set and conduct throughout my case. He didn't set unrealistic expectations about possible outcomes or make promises he could not deliver on. He was professional, honest, diligent, prompt, knowledgeable and an asset to my case. He did not nickel and dime me, but provided attentive service and I am glad I retained him as my lawyer. I hope I do not need his representation again in the future, but if I am in need of a lawyer, I'll be calling Derek again. There are a lot of options out there. I highly recommend Derek Ewin.
Read less
Posted by anonymous | May 12, 2014
Good luck finding someone better..
I don't know where to keep things short, if you need a lawyer, choose Derek Ewin. This guy was there for me from the beginning till the end. He handled everything that needed to be done and let me go on living my everyday life without the extra burden of dealing with the court system and DMV. The best part about him is his true care for his clients. I was in an awful state of mind when I got my DUI. Derek was there for me and was available to call even if I just needed someone to talk to. He's a class act and I couldn't have asked for a better attorney. I was pulled over for a DUI and blew a .093. I was cited and expected to have my license suspended and also expected hefty fines. After 3 months of Derek's hard work, my case has been completely dropped! A+++++++ I would recommend to ANYONE!
Read less
Posted by anonymous | November 20, 2013
One of many Miracles
Derek was calm, cool, and collective. He is well mannered man, very Professional to all types of lawyers including the DA's office. I believe his background of having been on both sides of the court room helped lot in my case. He didn't hesitate to pray with us upon request. He helped lower charges and with virtually no jail time. I was able to do everything the court asked of me including 52 weeks of DV classes, with a few years of probation. Derek is very knowledgeable and kind. But, very assertive as needed. Thanks a lot Derek! I am free to live a second chance to live a better life and to serve others. May the Lord be with you.
Read less
Posted by anonymous | April 19, 2012
I highly recommend Derek Ewin
I just want to start out by saying this man is not just an attorney you talk to on a business level, but a friend. He is a great person and the best defense lawyer i have ever spoke to in my life. I was facing severe felony charges and at times felt no hope. I was going to college and wanted to have a bright future, but I knew that my charges could prevent all that. Derek was always there to keep my head up and keep everything in my life positive. The one and only thing he asks from you is honesty. Derek was able to resolve my case to an even better outcome than I was hoping for. This man did not only protect me through this case, but in a very strong sense he saved my life. I strongly recommend Derek Ewin as a criminal defense lawyer.
Read less
Posted by Chris | April 4, 2012
A Truly Genuine Gentleman and Phenomenal Attorney
There are literally a handful of people for whom I would take a bullet. This list includes my family and a few friends. Honestly, in my wildest dreams, I would never have contemplated that I would add an acquaintence, much less a lawyer to this list. Derek Ewin has given me my life back - it's a good thing too because it would have ruined Christmas for my wife and three kids. My family and I knew I was innocent, and the first person I had initially hired was not proactive and was completely ineffective. I was lucky enough to have my sister and the rest my family advocating for me, and monitoring my first attorney's activities. That is when Derek came into the picture. My sister, who lives 3,000 miles away, then referred me to Derek. It may sound incredible, but she, as well as the rest of my family, and her entire church, prayed that I would be led to somebody who would help to redeem me. She claims it took her less than two minutes to search for attornies in this area, when something told her to give Derek's number to me. Obviously I wouldn't be writing this if my outcome had been different. You can trust him, and in fact, you should trust him. Derek is an expert at navigating the legal playing field. I'd also add he is widely respected not just by his peers, but also by the courts. And deservedly so. He communicates in a calm, crisp fashion, outlining every option available to you. It is wise to adhere to his advice, because he is the consummate expert on the law. He is a true optimist, yet a realist at the same time. He will give you the best and worse case scenarios - but keep your faith, and he will have faith with you. I am not a very religious man, but I truly believe the Lord works through him. Bottom line - If you believe you are innocent, don't give up, tell him the truth, and you really couldn't have a better professional on your side.
Read less
Posted by Farrah | February 27, 2012
The best attorney in town!
The first time i spoke to him I knew that he was the one I want to represent me. He was very clear with his explanations and was very strategic in handling my case. He was also very prompt and professional. Even after my case got dismissed, he still was very helpful to me. I am very satisfied with the way he handled my case. I couldn't thank him enough. Hiring him was the best choice.
Read less
Posted by Jay | February 16, 2011
Compassionate and honest.
Derek Ewin assisted me through a very tough period of my life. He did so while providing me with realistic potential outcomes. He was straight and to the point but never lacked empathy for what I was going through. I highly recommend Mr. Ewin's services if you find yourself up against the legal system's meat grinder. He will explore all options and give you timely information so that you do not feel in the dark. While incarcerated I was kept informed personally be several visits. He never judged me, but looked at the issues at hand from several perspectives while maintaining a firm grip on the legal aspect and ramifications. His demeanor while in court was professional and it was clear that the court too shared my respect for Mr. Ewin.
Read less
Posted by Leona | February 4, 2011
Excellent defense
I thank God daily for discovering Derek Ewin and that he was able to give me back my husband and in one piece. I have told everyone I know, if you need an excellent attorney call Derek Ewin. It was by chance (or maybe not) that I did an internet search and saw his website. God intervened when he answered the phone on a Sunday night. From the beginning both Pat and I had a real good feeling about him, sometimes you just know you can trust someone. Derek always listened with true empathy and were there for us not only as our attorney but as our friend. He listened to all our concerns and comforted us when necessary. He never lost faith in Pat. He is a man of integrity, gentleness, righteousness and decency. Justice has been served thanks to him. Derek handled our case with class and grace...we owe you our lives him.
Read less
Posted by Pat | February 4, 2011
Best Attorney
I need to share with you how much knowing Derek Ewin and having him work on my case has changed our life. Derek was always there for both of us (my wife and I) when we needed him no matter the time of day, or the day of the week. He gently guided me through the legal jungle that I faced, and made it possible for me to go on when sometimes it seemed like the nightmare would never end. There were times that I despaired of ever being able to get out from under the bureaucratic errors that had me facing possible jail, fines, and loss of license. When I describe Derek to others who have not had the pleasure of meeting him I tell them that he are a true Christian gentleman. Even when cross examining a witness he does it without doing injury. The CHP officer had praise for Derek and the way he treated him even after cross examination. Derek was able to show his errors and have him discredit his own testimony without humiliating, insulting or degrading him in any way. In my heart I know it is his faith that makes Derek who he is, and it is that faith that made it possible for him to do all he did to save me. I thank him for giving me back my life. Pat
Read less
Posted by Craig | January 28, 2011
Thanks Derek
Derek is very thorough and an expert in his field and went beyond the call of duty. I would recommend him without hesitation.
View less reviews


We have not found any cost information for this lawyer

Contact for Details


AVVO RATING 8.8 (Excellent)

Work Experience

  • Lead Attorney
  • Law Office of Derek R. Ewin
  • 2005 - Present
  • Deputy District Attorney
  • Contra Costa District Attorney's Office
  • 1994 - 2005
  • Volunteer Attorney
  • Ventura County District Attorney's Office
  • 1993 - 1994
  • Court Certified Legal Intern
  • Yolo County District Attorney's Office
  • 1992 - 1993
View all work experience


  • University of California at Davis School of Law
  • Juris Doctorate
  • 1993
  • University of California - Los Angeles
  • BA - Bachelor of Arts
  • 1990

Sample of Legal Cases

  • People v. S.M.
  • Dismissed
  • People v. S.G.
  • To be dismissed
  • People v. R.B.
  • No license suspension. No charges in court
View all legal cases


  • Contra Costa County Bar Association
  • Member
  • 2005 - Present
  • California State Bar Association
  • Member
  • 1993 - Present
  • California DUI Lawyers Association
  • Member
  • 2012 - 2013
  • California Public Defenders Association
  • Member
  • 2010 - 2013
  • National Association of Criminal Defense Lawyers
  • Member
  • 2008 - 2013
View all associations

Languages Spoken

  • English

Honors and Awards

  • Justice of the Moot Court Board - National Team
  • U.C. Davis School of Law
  • 1993

Speaking Engagements

  • Every 15 Minutes
  • Legal Consequences for a DUI
  • 2013
  • Every 15 Minutes
  • Legal Consequences for a DUI
  • 2010
  • Police Academy Training
  • Constitutional Law
  • 1999
  • Officer Training
  • Constitutional Law
  • 1995
View all speaking engagements

Attorney endorsements

Received (7)
Given (6)
Endorse Derek
Criminal defense Attorney | May 02
Relationship: Co-worker
"I have known Derek for almost 20 years. I worked with Derek in the Contra Costa County District Attorney's Office for several years. He was always an outstanding ethical prosecutor. I have also had the pleasure of observing Derek's skills as a defense lawyer. Derek is one of the most effective defense attorneys in the Bay Area. This is so because he is well respected as a an excellent trial attorney. He is also well-known for his integrity. I would highly recommend Derek Ewin to a friend in need of a good criminal defense or DUI attorney."
DUI and DWI Attorney | Aug 03
Relationship: Fellow lawyer in community
"I endorse this lawyer."
Criminal defense Attorney | Apr 14
Relationship: Fellow lawyer in community
"I have known Derek about 25 years now. I have had the pleasure of watching a good attorney hone his professional skills to a nice edge. While he does his utmost to settle a case he will not hesitate going into a trial situation if necessaary. I have referred more than a few to Derek and always heard great things."
Criminal defense Attorney | Jun 12
Relationship: Fellow lawyer in community
"I endorse Derek. He is a highly skilled attorney that is well respected in the legal community."
Criminal defense Attorney | Dec 11
Relationship: Fellow lawyer in community
"I endorse this lawyer. Mr. Ewin is a very experienced and knowledgeable attorney. He is conscientious of his clients needs and takes the time to help them understand the issues in their case."
Criminal defense Attorney | Sep 25
Relationship: Worked together on matter
"Derek is an outstanding attorney who gets exceptional results for his clients. Having worked with Derek in the past, I can attest to the high level of personal attention he gives to each and every case. I highly recommend Derek to anyone in need of legal counsel."
Criminal defense Attorney | Feb 24
Relationship: Worked together on matter
"Derek is an excellant attorney. He is always very well prepared and is an expert in criminal law. He also knows all the judges and district attorneys. You couldn't ask for a better attorney."
View more endorsements
Criminal defense
Personal injury
Criminal defense
Criminal defense