Koonz, McKenney, Johnson & DePaolis LLP
District of Columbia D.C. (202) 796-3291
Virginia VA (703) 498-2928
Maryland MD (301) 637-4614
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our firm has a
40-year history
of results
our firm has a
40-year history
of results
Our Lawyers have substantial experience in Northern Virginia, Washington, D.C., and Maryland.
we are active
members of the
we are active
members of the
Our team is involved in several charitable organizations, including Bread for the City and the Capital Area Food Bank.
we are leaders
in our field
we are leaders
in our field
We have received recognition from several publications including Best Lawyers, Washingtonian Magazine, Martindale-Hubbell, and Super Lawyers.
over $1 billion
recovered for
our clients
over $1 billion
recovered for
our clients
We are committed to each and every client who retains us, regardless of the case’s size.

Washington, D.C.,
Virginia, and Maryland Personal Injury Lawyers

Koonz McKenney Johnson & DePaolis is committed to serving our clients, and our offices remain open. We share your concern over this public health crisis, and we are doing our part by working remotely and practicing social distancing. Please be assured that we are monitoring all calls and emails and accepting new clients. We will respond promptly to all inquiries. Thank you for your continued confidence in us as we navigate through this uncertain time.

For more than 40 years, the Washington, D.C., Virginia, and Maryland personal injury lawyers of Koonz McKenney Johnson & DePaolis LLP have successfully obtained substantial monetary compensation on behalf of individuals who have been injured or for families of those killed due to the negligence or wrongdoing of others. Our law firm is one of the largest, most experienced, and most respected plaintiff’s personal injury law firms in the region. In fact, our recognitions include four of the firm’s attorneys being selected as Top Lawyers by Washingtonian Magazine, seven chosen by their peers for inclusion in Washington, D.C. Super Lawyers and five of our personal injury attorneys being selected for inclusion in Best Lawyers in America©.

Washington, D.C., Fairfax, and Maryland Personal Injury Attorneys are on your side

If you have been injured purely as a result of someone else’s wrongful conduct, D.C. personal injury law grants you to the right to full compensation for every dimension of your losses – physical, financial, and psychological. The trick, however, is enforcing these rights, since personal injury law is complex and arcane, filled with pitfalls for the unwary.

The dedicated Washington, D.C. personal injury lawyers at Koonz McKenney Johnson & DePaolis LLP, enforce the legal rights of personal injury victims. It is our job and our mission – we practice no other type of law. After 40 years of practice and a startling $1 billion in compensation collected for our clients, insurance companies are not laughing at us. Instead, they are scrambling to reach a settlement so they don’t have to face us in court.

Koonz McKenney Johnson & DePaolis LLP
Koonz McKenney Johnson & DePaolis LLP
Koonz McKenney Johnson & DePaolis LLP
Should I Hire a Personal Injury Attorney?

If you or a loved one were seriously injured in an accident, we recommend that you speak with a personal injury attorney about filing a claim. If your injuries were a result of the negligent actions of another person or company, that party may be held accountable for causing them. However, the legal process can be extremely complex and corporations and insurance companies are notorious for looking after their own best interests. You may also be faced with significant medical bills, lost wages, and even the possibility of lifelong disability. Our personal injury lawyers can help. We will fight for justice for you and your family, and handle all interactions with insurance companies and defense counsel. At Koonz McKenney Johnson & DePaolis LLP, we handle all cases on a contingency basis, meaning we don’t charge a fee unless we recover money on your behalf.

Elements of a Personal Injury Claim

Personal injury law allows you to hold a person or company responsible for your injuries through the principle of negligence. When someone acts in a reckless or careless manner and causes injury to you or another person, they may be held legally liable for the harm they caused. However, four specific elements must be proved in order to establish that a defendant acted negligently.

Proving negligence is essential in most personal injury claims. However, every case is different and a breach of duty may manifest itself in many different ways. In some situations, the defendant may have owed a ‘special duty’- a second duty imposed by case law or state statutes – that you may be unaware of. It is important to review the facts of what happened to you with an attorney so that nothing is missed and you are able to recover full and fair compensation.

Call Our Personal Injury Attorneys Today

If you were seriously injured in an accident in the Washington, D.C. metropolitan area, Fairfax, Virginia, or Maryland call Koonz McKenney Johnson & DePaolis LLP for a free and confidential case evaluation. Our attorneys will listen to the facts of your case, go over your options, and help you fight for fair and full financial recovery.

Case Results We are committed to each and every client who retains us, regardless of the size of their case. View All results
$9.3 M settlement for pedestrian accident +
settlement for pedestrian accident Roger Johnson and Kasey Murray recently recovered $9,300,000 for a pedestrian who was struck by a vehicle. The pedestrian sustained life-changing crush injuries and is now disabled as a result of the accident. The case involved legal questions regarding the duties of drivers and their employers, as well as the legal impact of the recovery of workers’ compensation benefits on a personal injury lawsuit. The settlement is one of the largest in the firm’s history.
$4 M settlement for child with internal injuries +
settlement for child with internal injuries When a one-year-old boy had injuries to his internal organs, the case settled after protracted litigation. The case settled for over $4 million dollars. Paulette Chapman and her litigation team retained nationally recognized experts to testify that injuries were caused by the negligence of the defendant.
$3 M settlement for pedestrian accident +
settlement for pedestrian accident A driver lost control of her car when she backed out of a parking space. The car struck a pedestrian who was exiting a store. The store agreed to pay the pedestrian $3 million dollars after watching a computer reenactment of the ways safety poles would have prevented injury to the pedestrian. Paulette Chapman and her litigation team devoted many hours to the computer reenactment.
$2.9 M settlement for deliveryman accident +
settlement for deliveryman accident Our client was in an office building delivering packages. He sustained an injury when the elevator allegedly malfunctioned. The defense attempted to claim that our client was responsible for his own injuries, but injury lawyers Julie Heiden and Peter DePaolis ultimately obtained a $2.99 million award for the deliveryman. View the article..
$2.5 M verdict for woman with tbi +
verdict for woman with tbi Senior Partner Peter C DePaolis, along with co-counsel Ann Jones and Donna Rostant, recently received a jury verdict of $2,550,000 in a medical malpractice trial in Stafford County, Virginia. The client is a young woman who suffered a traumatic brain injury as a result of a surgical error while undergoing back surgery.
$2.3 M recovery for an injured worker +
recovery for an injured worker Washington Metro Area Transit Authority (WMATA) has agreed to pay $2.3 million to the daughter and widower of government worker injured in a WMATA accident. A Metro bus struck a female pedestrian when she was in the crosswalk. Virginia injury attorney Julie Heiden and her colleagues successfully represented the daughter for her claims of wrongful death.
$2.2 M settlement on behalf on injured worker +
settlement on behalf on injured worker Settlement of a construction case for $2.2 million on behalf of an injured worker. A contractor allegedly violated an OSHA safety regulation. The team was responsible for presenting the evidence of a safety violation, presenting proof of the spinal injury that prevented the worker from resuming work in the building trade, and researching construction laws. The firm’s litigation team thoroughly researched construction law, showed a safety violation, and proved that the violation caused the worker’s spinal injury, which prevented him from resuming work in the building trade.
$2.1 M settlement for internal injury case +
settlement for internal injury case A man who developed internal injuries settled his case without trial for $2.1 million dollars. The firm’s litigation team used alternative dispute resolution techniques to resolve the case without filing a lawsuit. Part of our success was retaining a retired judge to assist the parties pre-litigation.
$1.7 M settlement - woman disabled after intersection crash +
settlement - woman disabled after intersection crash A woman was driving with her daughter as a passenger. Another driver, who was working at the time, ran a red light and crossed into the woman’s path, causing a serious car crash. She required five surgeries after the accident. Injury attorneys Peter DePaolis and Julie Heiden secured a $1.75 million award for the woman, who is now disabled because of the car accident.
$1.5 M settlement for construction worker +
settlement for construction worker A gust of wind blew a construction worker off the side of a building. Using expert analysis of the weather, we convinced the construction company to pay $1.5 million dollars.
$1.2 M settlement for WWII marine veteran +
settlement for WWII marine veteran A healthy and active 82-year-old WWII veteran was placing his luggage into the trunk of his car when he was struck from behind by defendant. Plaintiff’s right leg was crushed between the two cars. As soon as EMT arrived on the scene, it was immediately apparent that the Plaintiff had suffered a severe car accident injury to his leg. The parties agreed to the settlement of $1.2 million after a nine-hour mediation.
$1 M recovery for worker injured in slip and fall +
recovery for worker injured in slip and fall Case involving a legal secretary who had slipped and fallen on a recently mopped floor while at work, sustaining a knee injury. Mr. Schloss pursued both a workers compensation claim and a negligence claim. After significant litigation, Mr. Schloss was able to secure nearly $1,000,000.00 in total benefits for his client.
$750 K wrongful death jury verdict upheld +
wrongful death jury verdict upheld Koonz McKenney Johnson & DePaolis LLP recently won an important victory in a medical malpractice case. The D.C. Court of Appeals upheld the wrongful death jury verdict of over $750,000 in favor of the wife and son of a forty-six-year-old Metrobus operator who had died as a result of a blood clot in his heart, due to medical malpractice.
View All results
we have built our business on client referrals

I interviewed with 3 other law firms that wanted to take my accident case and then I met Peter DePaolis. He clearly made a positive impression with his accomplished manner, his knowledge of effective strategies and his commitment to excellence. Throughout the process, he never let me down and he made sure I was prepared to properly communicate regarding the impact of my injuries. He demonstrated compassion to me regarding my situation and he was determined to achieve the highest award possible.


I cannot express how pleased I was with the way Mr. Roger Johnson and his administrative assistant Mrs. Betsy Berry handled my accident case. They were very thorough with processing and negotiating my case with all medical facilities and insurance companies which resulted in a settlement far more than I expected. With a flat fee of 1/3, Mr. Johnson exceeded all expectations by also keeping me fully aware at all stages of negotiations as well as providing expert and detailed advice to me as his client.


I highly recommend the law firm Koonz McKenney Johnson & DePaolis LLP. Mr. Peter DePaolis and his team represented me after being rear-ended in an automobile accident and sustaining multiple injuries. Every day I count my blessings for the legal representation I received from such an honorable and highly competent team. Mr. DePaolis and his staff are consistently professional, and always prompt and proactive regarding communication.


Roger Johnson, Kasey Murray, and Betsy Berry helped me navigate a very complicated personal injury case. They did not waver in their determination to settle the details in this complicated matter. Roger is a thoughtful and highly competent attorney that will work very hard for you. Meeting him was a benefit to needing an attorney. I will always consider Roger a friend and the nicest, but also the most effective, lawyer that I have ever met.


Mr. DePaolis has never once forgotten about my Father, and while he was still alive, Mr. DePaolis was attentive and kind, while never losing sight of his purpose which was to represent my Father. He has continued to do so while maintaining contact with my family regarding all legal matters surrounding my father’s disease and death. I would highly recommend Peter DePaolis and cannot say enough good about him. Thank you Mr. DePaolis!

D. Fox

Special thanks to Mr. Schloss and his assistant Suzy Kelly. You guys are the Best of the Best. Dear Mr. Schloss: I wish to thank you for the fantastic job that you accomplished yesterday. I hope that you know how much I appreciate what you have done for me. As the saying goes, when you’re good, you’re good. I consider you as being fantastic.

Client from West Virginia

Mr. DePaolis, I can’t express enough how much your hard work and the results meant to my Dad. If you remember, 3 weeks before his passing, he stopped all treatments. After learning about the large settlement he knew that financially my mom would be okay. He was tired and ready to go and that check made his leaving us much easier for him. Eleven years last month, I still miss him every day. God Bless!

Client in Virginia

We owe so much to Mr. Schloss and you for taking care of us and leading the way when times were tough. Money can’t buy that type of dedication. A person really has to love what they’re doing to do that type of job for their clients. We’re glad you both are on our side.

Client from Maryland

We retained the service of Mr. Peter DePaolis who immediately provided assurance and an overwhelming sense of empathy for us. Throughout the process, his level of commitment, communication and responsiveness were exemplary. Our family immediately felt that we truly had an advocate that held our best interests at heart. I would wholly recommend Mr. DePaolis for any legal services and advice going forward.


To Mr. DePaolis: I want to express my sincere gratitude for your professional and compassionate service you provided with the handling of my accident case. I was confident of a positive outcome after our initial meeting and am glad that I was correct. Your approach to the situation was impressive and you were reassuring to any potential doubts. Not only did you start the process proactively but you were passionate and honest.

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