Donald Matthew Knepper

Donald Matthew Knepper

also known as Donny, Donnie

4.9
Rating: 9.3

Licensed for 19 years

Family Lawyer at Rockville, MD
Practice Areas: Family, DUI & DWI, Criminal Defense ... +2 more

100 South Washington St., Rockville, MD

About Donald

Biography

Practice Areas

5

Practice Areas

DUI and DWI 35%

DUI, DWI, Driving on Suspended, Driving on Revoked, and other traffic violations & citations.

19 years | 292 cases

35%
Family 35%

Divorce, Custody, Child Support, Post-Judgement, Peace & Protective Orders, Paternity, Seperation Agreements, Prenuptial Agreements, etc

19 years | 53 cases

35%
Criminal Defense 20%

Extensive experience with serious criminal charges ranging from felony jury trials in circuit court to misdemeanor district court cases. Fights to win every case and willing to go to trial whenever it is in the interest of the client.

19 years | 326 cases

20%
Personal Injury 5%

Car Accidents, Medical Malpractice, Elder Abuse, Negligence, etc.

19 years | 15 cases

5%
Trusts 5%

Wills, Trusts, Estate Planning, Guardianship, Trusts & Estate Administration Management, Trust litigation

13 years | 2 cases

5%

Fees and Rates

Cost

Free Consultation

$0 first 60 minutes


Payment Methods

  • Cash
  • Check
  • Credit Card

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Licenses

Licensed in Pennsylvania for 6 years

State: Pennsylvania

Acquired: 2020

Active

No misconduct found

Licensed in District of Columbia for 12 years

State: District of Columbia

Acquired: 2014

Good Standing

No misconduct found

Licensed in Maryland for 19 years

State: Maryland

Acquired: 2006

Active

No misconduct found

Licensed in Massachusetts for 15 years

State: Massachusetts

Acquired: 2011

Inactive

No misconduct found

Licensed in New Hampshire for 15 years

State: New Hampshire

Acquired: 2010

Inactive

No misconduct found

Location

The Law Offices of Donny Knepper

100 South Washington St., Rockville, MD, 20850

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Donald Matthew Knepper's Reviews

Avvo Review Score

4.9 /5.0

47 Client Reviews

Showing 1 - 5 of 12 reviews | General Knowledge

Posted by Dan | April 25, 2025 | Hired Attorney | Trusts

Knowledgeable, helpful, competent. HIGHLY RECOMMEND!

We had our Trust prepared by a very expensive attorney. Just to be sure, I asked Mr. Knepper to look it over. He was extremely thorough, and discovered that although we had a "Trust," there was nothing in the Trust Mr. Knepper sat with us for a couple of hours and explained Will's, Estates, and T...rusts. It was clear that he knows his stuff. I hired him to improve our "trust," and help us decide what to our into the trust. Without Mr. Knepper, we would had a worthless trust. I cannot stress enough how well he explained all of the different ways to set it up, and show us how it works. This is 100% the person that you need. DG

Posted by Abby | May 21, 2018 | Hired Attorney | Speeding & Traffic Ticket

Definitely hire this lawyer

I hired Donny twice for issues with my provisional license. The MVA is huge pain when it comes to a provisional license and I think that I might have the worst luck in the world. I am a good driver but it is like anytime I made any kind of mistake, no matter how small, there was a cop who was ready... to pull me over for it. The MVA was getting ready to suspend my license twice. Donny came through for me both times. I would not be able to function without my license. I knew for sure that the MVA was going to suspend my license the second time. I had already been cut a break and here I was coming back again. Donny looked at the case and said he could help. He really knows the law and he is not a jerk about things. He put together a plan and executed it to perfection. I definitely felt prepared going into the hearing. He struck the right tone with the judge and I walked out of there with my license in hand. If you need a lawyer then you should call Donny

Posted by Lawrence | May 14, 2018 | Hired Attorney | Speeding & Traffic Ticket

Best lawyer in Rockville!

We hired Donny to help my mother-in-law with a traffic case. My mother-in-law is an older woman and she is not from the U.S. I was on the scene of the incident and I can tell you for sure that the police officer overreacted. Not only was the officer angry and hostile towards this older woman, but ...he issued her nine citations! And then sent paperwork to the MVA to have her re-tested! It was bad. And my mother-in-law had made an honest mistake, turning the wrong way on a confusing road. Another police officer who was on the scene told me that people make the same mistake every day. We were not trying to say that she did nothing wrong, but she should only be cited for what she actually did. It just seemed like the officer was excessive and mean. We just wanted this complicated and tense situation to be resolved in a peaceful way. We hired Donny and he not only helped with the court case but he also sent a letter to the MVA, complete with a screenshot from Google Maps, explaining that my mother-in-law made an honest mistake. The MVA still re-tested her, but I have to think that Donny’s letter helped put the entire case into context. She was able to get her license back before the court date! Originally, the prosecutor seemed out for blood. He wanted my mother-in-law to plead guilty to fleeing and eluding a police officer (you can go to jail for that). But when it was all said and done, my mother-in-law was only found guilty of two smaller traffic tickets and Donny was even able to keep those off of her record. Throughout the entire process, Donny was very good to deal with. He was very responsive and very helpful. He made a difference for us. If you need a lawyer he is someone who you should call.

Posted by Marcus | April 04, 2018 | Hired Attorney | Child Support

Amazing Attorney!

Donny was my lawyer for a child support case. My ex took me to court, trying to squeeze me for more money than I had. I am a working man who has always taken care of his child. I did not have the money to pay my ex what she was asking for, but I also did not have a lot of money to pay a lawyer to ...help me fight the case. I felt that I was going to be taken advantage of one way or the other. If you are in that situation the you know exactly what I am talking about. A coworker told me to talk to Donny Knepper. I am so glad that I took that advice. First of all, Donny is easy to talk to. He is not some nerdy lawyer. He knows how real people live their lives. He also worked within my budget. And he got results! He went right to work. He started contacting people while I was still in his office. It was such a relief, seeing someone take action like that. I don’t know if he has a crystal ball or what, but he told me how the case was going to go, and it went pretty much exactly like he said it would. By the end of the case, I was actually able to argue that my ex owed me child support! Think about that one. If not for Donny then who knows what would have happened. He did not look at me as just a way to make money, he was definitely in it to help. He never blew me off. He answers my calls, and he did not disappear after I hired him. If you need a lawyer then you need to call him.

Posted by Dana | March 18, 2018 | Hired Attorney | Divorce & Separation

Wonderful Divorce Attorney

I hired Donny for my divorce case because I was told that he was an honest lawyer who would get results without running up my bill. They were right, not only was he honest, but engaging and understanding, as well. I'm so glad I hired him to settle my case! It was important to me that I hire an a...ttorney who I can trust. My ex and I had been married for a long time and we had been financially successful, which meant that there was money to fight over. Not only that, but my ex can be quite difficult. There was ample opportunity for me to get taken advantage of by a lawyer. Donny never let me down. He always looked out for MY best interest. Donny did everything he could to keep the case moving. I am not sure what was going on with my ex and his lawyer, but they did not seem interested in getting anything done quickly. Donny stayed on them, pushing them to produce the records that we needed and come to the bargaining table. Donny also took the time to educate himself about my case. He and his staff processed the information and made everything very easy to understand. I knew what to expect at each stage of the litigation and I knew what was reasonable and what was unreasonable. He was also able to "talk me down" many times, when my ex was doing everything in his power to send the divorce process into litigation. I feel very good about how my case was resolved. I did not want to spend (err waste) the resources going to trial and Donny understood that. He guided the case through a very fruitful mediation. I saved a ton of money working with Donny. I think that anybody who is going through a divorce should meet with him. His approach to the law is disarming and effective. He knows how to win. He helped me through what was the most difficult time in my life, and I am forever grateful.

See All Client Reviews

Donald Matthew Knepper's Lawyer Endorsements

Endorse Donald
Somair Syed Alam headshot
Somair Alam

Family lawyer | Feb 13

Relationship: Fellow lawyer in community

"Excellent family law attorney who is dedicated to client success."

Miguel Romao Palmeiro headshot
Miguel Palmeiro

DUI and DWI lawyer | Apr 20

Relationship: Fellow lawyer in community

"I have had the opportunity to witness Mr. Knepper in court and am impressed by his professionalism and ability to win for his clients."

Michael Golburgh headshot
Michael Golburgh

Family lawyer | Sep 25

Relationship: Opposing Counsel on matter

"I endorse Donny Knepper without condition. Donny is an exceptionally talented attorney, who knows the court system well and has strong mastery of civil procedure and litigation tactics. If Donny is the opposing counsel, you had better prepare well for any court event, as he is a forceful advocate for his clients and appears to take every opportunity to advance his clients' interests. It is easy to see why he has made a strong name for himself in the Maryland legal community. Also, as a former (always) U.S. Marine, he brings that diligence, ethics and controlled aggressiveness that is so important for a successful trial attorney. The Maryland Judges and Magistrates seem to recognize this, and give him the respect that is rightly due."

Christina Marie Hughes headshot
Christina Hughes

Criminal defense lawyer | Apr 24

Relationship: Fellow lawyer in community

"I endorse this lawyer. I have known Mr. Knepper for years and have had the opportunity to try multiple cases with him. He is a formidable opponent. He is knowledgeable on the law and is an effective litigator, which can be a rare combination. I would not hesitate to recommend his services."

Joshua Samuel Berman headshot
Joshua Berman

Criminal defense lawyer | Apr 08

Relationship: Fellow lawyer in community

"Mr. Knepper is an exceptionally zealous advocate for his clients. I am always impressed how much he will go the extra mile to effectively represent his client."

Benjamin Francis Bruins headshot
Benjamin Bruins

Criminal defense lawyer | Feb 20

Relationship: Fellow lawyer in community

"I endorse this lawyer. Mr. Knepper is one of the most experienced attorneys in the State of Maryland. He is extremely knowledgeable and effective in court. Mr. Knepper is known for getting fantastic results and is consistently aggressive in his representation."

Joseph William Fay headshot
Joseph Fay

Criminal defense lawyer | Feb 10

Relationship: Fellow lawyer in community

"Donny is a good lawyer who takes pride in good preparation and good results."

Robinson Sean Rowe headshot
Robinson Rowe

Criminal defense lawyer | Feb 05

Relationship: Fellow lawyer in community

"I endorse this lawyer. Mr. Knepper is an aggressive litigator who always brings his passion for winning and client dedication into the court room. He is highly respected by his colleagues, and most importantly, by the prosecutors and Judges. His clients receive the best in legal representation and Mr. Knepper has won numerous difficult and complex cases in trial. Any prospective client would do extremely well to seek counsel from Mr. Knepper."

Jeffrey David Katz headshot
Jeffrey Katz

Trusts lawyer | Feb 05

Relationship: Worked together on matter

"Donny brings a high minded work ethic, can-do attitude, and creative problem solving approach to each of his clients. He is an out of the box thinker who consistently delivers the goods. We've been impressed in his over the top delivery of legal services. Don't let his cool demeanor fool you-- Donny under promises and over delivers."

Jeremy D Rachlin headshot
Jeremy Rachlin

Trusts lawyer | Feb 05

Relationship: Worked together on matter

"It is my pleasure working with Donny to administer a trust. Donny is incredibly responsive to the client and to all other parties who are involved in managing this complex trust. He is guided by a high degree of professionalism, civility, and integrity."

Shawn A Gritz headshot
Shawn Gritz

Criminal defense lawyer | Nov 05

Relationship: Fellow lawyer in community

"I have known Donny for a long time. It is always a pleasure seeing him in court representing his clients. He is a zealous advocate who will give a client every bit of attention they deserve."

View All Endorsements
Jennifer Bassett Page headshot
Jennifer Page

Unknown lawyer

Michael Golburgh headshot
Michael Golburgh

Family lawyer

Christina Marie Hughes headshot
Christina Hughes

Family lawyer

Joshua Samuel Berman headshot
Joshua Berman

Personal injury lawyer

Brian David Sadur headshot
Brian Sadur

Family lawyer

Prudence Avery Upton headshot
Prudence Upton

Unknown lawyer

Benjamin Francis Bruins headshot
Benjamin Bruins

Unknown lawyer

Joseph William Fay headshot
Joseph Fay

Criminal defense lawyer

Robinson Sean Rowe headshot
Robinson Rowe

Litigation lawyer

Jeremy D Rachlin headshot
Jeremy Rachlin

Business lawyer

Jeffrey David Katz headshot
Jeffrey Katz

Estate planning lawyer

Shawn A Gritz headshot
Shawn Gritz

DUI and DWI lawyer

Experience

Rating:  9.3 (Superb)

Honors

2019

Super Lawyer, Super Lawyers

2016

Rising Star, Super Lawyers

2015

Rising Star, Super Lawyers

2006

Cum Laude, University of Richmond

2000

Yankee White Top Secret Clearance, United States Marine Corps

2000

Presidential Service Badge, United States Marine Corps

2000

Good Conduct Medal, United States Marine Corps

Work Experience

2013 - Present

Principal, The Law Offices of Donny Knepper

2006 - 2013

Associate, The Law Offices of Dan Gaskill

1998 - 2002

Presidential Helicopter Squadron, United States Marine Corps

Associations

2015 - Present

Maryland Criminal Defense Attorneys' Association

Member

2006 - Present

Montgomery County Bar Association

Member

2006 - Present

Maryland State Bar Association

Member

2014 - 2014

American Inns of Court

Member

Sample of Legal Cases

State vs. Lewis

Not Guilty

State vs. Addison

Nolle Prosequi

See More Legal Cases

Education

2006

University of Richmond, The T. C. Williams School of Law

JD - Juris Doctor

2002

Pennsylvania State University

BS - Bachelor of Science

Languages

English

Activity

Avvo Rating

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Avvo Rating Levels
10.0 - 9.0 Superb8.9 - 8.0 Excellent7.9 - 7.0 Very Good6.9 - 6.0 Good5.9 - 5.0 Average4.9 - 4.0 Concern3.9 - 3.0 Caution2.9 - 2.0 Strong Caution1.9 - 1.0 Extreme Caution