About Mark Steven

Mark Steven Knapp is a seasoned criminal defense attorney based in Liberty Lake, Washington. With a legal career that began in 1989, he has dedicated himself to specializing in criminal defense, civil rights, and domestic violence cases. His educational background includes earning a Juris Doctor from Gonzaga University School of Law in 1988, a prestigious institution known for its rigorous legal training. Since his admission to the Washington State Bar Association in 1989, Mr. Knapp is known as a knowledgeable and committed advocate for his clients. In 1990, Mr. Knapp founded the Law Office of Mark Knapp PLLC, which has served clients throughout Washington State for over three decades.

The firm handles a diverse range of cases, focusing primarily on criminal defense and civil rights issues. Domestic violence cases are a significant part of his practice, where he provides compassionate and skilled representation to those in need. His experience in these areas has made him a trusted resource for individuals facing serious legal challenges. Mr. Knapp has also gained recognition for his expertise in firearms law. He offers legal counsel on various issues related to the possession and use of firearms, an area of increasing importance in today’s legal field. His knowledge extends to the creation of NFA Gun Trusts, which assist clients in legally purchasing and owning firearms regulated under the National Firearms Act.

This specialized service is particularly valuable for individuals seeking to handle the requirements of firearms regulations in Washington State. In addition to his legal practice, Mr. Knapp is the founding president of the Armed Defense Training Association. This organization is dedicated to promoting responsible firearm ownership and providing self-defense training. Under his leadership, the association has aimed to educate the public on the legal and practical aspects of firearms use, fostering a culture of safety and responsibility among gun owners. His commitment to these principles reflects his broader dedication to civil rights and personal safety. Fluency in both English and Tagalog allows Mr.

Knapp to serve a diverse client base effectively. This linguistic skill enhances his ability to communicate with clients from various backgrounds, ensuring that they receive comprehensive legal support. By bridging language barriers, he is able to provide personalized attention and understanding to each client’s unique situation. As a result, Mr. Knapp continues to be a vital advocate for justice in his community, striving to make a positive impact through his legal expertise and commitment to client service.

Accepted Jurisdictions

Washington

Court Admissions

Washington State Supreme Court State Supreme Court · Admitted 1989

Types of Cases Handled

Criminal Defense Civil Rights Domestic Violence

Legal Services Scope

Trial Appellate

Office Locations

Main Office

 PO Box 914 Liberty Lake WA 99019

Sources

Information is based on available sources as of February 20, 2026. For the most current information, please contact the Washington State Bar Association or visit the official website of the Law Office of Mark Knapp PLLC.