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Donald Matthew Knepper
also known as Donny, Donnie
About Donald
Biography
Donny Knepper is an experienced trial attorney practicing law out of Rockville, MD. He has been licensed and practicing in Maryland since 2006. He is also licensed in New Hampshire, Massachusetts and Washington, DC as well as the Federal District Courts for Maryland and New Hampshire.
Over the course of Mr. Knepper’s career he has had a proven track record of success having handled over 1000 cases. He has enjoyed significant victories and has a high rate of success in front of a jury and at trial.
Former United States MarineDonny Knepper graduated from the University of Richmond, School of Law in 2006, earning Cum Laude. Mr. Knepper is a former United States Marine having served on the Presidential Helicopter Squadron earning a Yankee White Top Secret Security Clearance. Mr. Knepper earned his undergraduate degree from Pennsylvania State University.
Practice Areas
5
Practice Areas
DUI and DWI
35%
19 years | 292 cases
Family
35%
19 years | 53 cases
Criminal Defense
20%
19 years | 326 cases
Personal Injury
5%
19 years | 15 cases
Fees and Rates
Cost
Payment Methods
- Cash
- Check
- Credit Card
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Chat withLicenses
Licensed in Pennsylvania for 6 years
State: Pennsylvania
Acquired: 2020
No misconduct found
Licensed in District of Columbia for 12 years
State: District of Columbia
Acquired: 2014
No misconduct found
Licensed in Maryland for 19 years
State: Maryland
Acquired: 2006
No misconduct found
Licensed in Massachusetts for 14 years
State: Massachusetts
Acquired: 2011
No misconduct found
Licensed in New Hampshire for 15 years
State: New Hampshire
Acquired: 2010
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
Showing 1 - 5 of 47 client reviews from Avvo
Posted by Dan | April 24, 2025 | Hired Attorney
This review is from a person who hired this attorney.
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...
Posted by Sam | April 26, 2020 | Hired Attorney
This review is from a person who hired this attorney.
Great Lawyer in Rockville - Highly Recommended
Donny was the best lawyer for the best price during my DUI case. He walked me through every step of the process and set my mind at ease during a difficult time. He is charismatic and personable. I am so grateful for the service he provided to me and would recommend anyone in the Rockville area to con...
Posted by anonymous | November 19, 2018 | Hired Attorney
This review is from a person who hired this attorney.
Very poor
Truly regret hiring Donny Knepper. Would not recommend. Donny struck a very bad chord with the judge and states attorney for my case I had with him which I think contributed to a harsher judgment. He was very aggressive in court and did not come fully prepared. He was very difficult to get in touch...
Posted by Steve | August 24, 2018 | Hired Attorney
This review is from a person who hired this attorney.
High-quality legal service
My son was cited for driving while his license was suspended. The problem was that the citation was issued before the notice that his license was mailed to him, as evidenced by the postmark on the envelope containing the notice letter. We provided Donny with the evidence, and he contacted the Distr...
Posted by anonymous | August 8, 2018 | Hired Attorney
This review is from a person who hired this attorney.
DUI case in Montgomery County Maryland
From my initial telephone conversation about my DUI case to the day of my trial and eventually acquittal on all charges Donny was honest with the gravity of the my case, the complications involved and the potential eventualities of the varied paths to addressing the issue. In the end what made t...
Donald Matthew Knepper's Lawyer Endorsements
"Excellent family law attorney who is dedicated to client success."
"I have had the opportunity to witness Mr. Knepper in court and am impressed by his professionalism and ability to win for his clients."
"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."
"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."
"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."
"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."
"Donny is a good lawyer who takes pride in good preparation and good results."
"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."
"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."
"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."
"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."
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Experience
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' AssociationMember
2006 - Present
Montgomery County Bar AssociationMember
2006 - Present
Maryland State Bar AssociationMember
2014 - 2014
American Inns of CourtMember
Sample of Legal Cases
State vs. Lewis
Not Guilty
State vs. Addison
Nolle Prosequi
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
Legal Answers
Legal Guides
Legal Answers
Q&A
Will pbj show up on a background check?
30 Apr 2015
Q&A
I'm 20. Got a DUI. I don't want the interlock. How long will my license be suspended?
08 Mar 2015
Q&A
Domestic violence case re opened , due to my filing motion to seal/ shield
02 Mar 2015