Find an Attorney

Jonathan L. Katz

Pursuing your best defense since 1991 against DUI, felony and misdemeanor prosecutions. Always fully prepared for trial and court battle.

Jon Katz, P.C.

10509 Judicial Drive
Suite 101
Fairfax, VA 22030

Phone: 703-383-1100

Website: katzjustice.com/

CALL NOW

VISIT WEBSITE

LEAVE A MESSAGE

About Jonathan L. Katz

Since 1991, practicing DWI/DUI defense and criminal defense. Pursuing innovative approaches at trial and beyond to obtain as much success as possible. Top-rated by key lawyer reviewers AVVO (10/10) and Martindale-Hubbell (AV/ 5/5). Based in Fairfax, Virginia, and practicing in Northern Virginia and beyond.

Contact Jonathan L. Katz

Provide some details about your situation, but remember not to include sensitive information. An attorney-client relationship is only formed once an attorney formally agrees to represent you.

Find an Attorney

Enter your city, state, or Zip code below to locate a qualified attorney who has demonstrated a commitment to defend those accused of DUI and related crimes.

Virtual Forensic Library

NCDD members have access to a comprehensive forensic library that provides invaluable information to be used when defending clients charged with DUI.

This library includes scientific articles on drug and alcohol intoxication, toxicology and pharmacology, methods of testing for blood alcohol content, field sobriety testing, potential errors that may occur during testing, accident reconstruction, expert testimony, and evidentiary rules. This valuable information can ensure that you provide a high quality defense to clients charged with DUI based on the circumstances of their case and the laws in their state.

Virtual Forensic Library

FROM OUR BLOG

AI in Court Filings: The Ethics Line Between Assistance and Abdication

03/30/2026

By Ryan Katz It is no secret that Artificial Intelligence, or AI, is vastly changing the landscape of many different fields. While the practice of law is certainly not something anybody would want to be taken over by AI in any major way, AI is still a tool which has applications for lawyers. Generative AI can help lawyers brainstorm arguments, organize...

Oral Fluid Testing: Roadside vs. Evidential Analyses

09/02/2025

Written by Ashley M. Hart As cannabis is being decriminalized in many states, there has been increased interest in rapid roadside tests to detect THC and other substances for intoxicated driving charges. A majority of states now have oral fluid testing in some form: roadside (presumptive) or evidential (confirmed in a lab). These states include Alabama, Alaska, Arkansas, Arizona, California, Connecticut,...

Become an
NCDD Member

Benefits of NCDD Membership

Members of the NCDD not only demonstrate that they are qualified DUI defense attorneys, but they have access to valuable information and resources. We provide access to documentation blood alcohol testing devices and scientific articles related to alcohol, drugs, driving, and testing.

We offer training on trial techniques and scientific testing, and we provide access to experts and a comprehensive knowledge base of cases and motions. With all of these resources at your fingertips, you will be able to win more cases

Become a Member Become a Sustaining Member

Membership Plans

Depending on your level of experience, we offer multiple plans for NCDD Membership. Attorneys who have been practicing for less than six years are eligible for a New Attorney membership, while those who have been practicing for over six years can receive a Seasoned Attorney membership. We also offer memberships for Public Defenders.