Herndon Criminal Defense Lawyer

DUI and DWI Defense for Herndon Residents

Virginia takes DUI and DWI charges seriously, and Fairfax prosecutors aggressively pursue these cases. A conviction can mean license suspension, mandatory jail time, heavy fines, and long-term damage to your personal and professional life. Jon Katz defends Herndon residents charged with DUI by scrutinizing every detail—whether the stop was lawful, whether the field sobriety tests were properly administered, and whether breath or blood results are reliable and admissible.

As a member of the National College for DUI Defense and someone trained in police-administered sobriety testing, DUI Defense Attorney Jon Katz brings technical and legal insight to every DUI case he handles. He knows the traps and assumptions built into these prosecutions and how to dismantle them. If a plea offer isn’t in your best interest, Jon doesn’t hesitate to take your DUI case to trial and fight for an acquittal.

Defending Drug Charges in Herndon, VA

Drug arrests—whether for personal possession or more serious distribution charges—can have long-term consequences for your freedom, your job, and even your immigration status. Jon Katz defends people in Herndon and Fairfax County accused of drug crimes by challenging illegal searches, scrutinizing search warrants, and pressing the prosecution on whether it can prove actual knowledge and control over the alleged drugs.

Jon leaves no stone unturned when it comes to drug evidence. He evaluates the integrity of the laboratory analysis, investigates the use of informants or drug dogs, and fights to exclude evidence obtained through constitutional violations. If you’re charged with any drug offense in Herndon, Jon will be on the front line challenging the government at every turn.

Assault and Violent Crime Defense in Herndon

When you're accused of assault or a violent offense in Herndon, prosecutors often assume guilt before they even understand the facts. Jon Katz knows that violence cases are frequently driven by one-sided reports or misunderstandings, and that the person who called the police is not always the victim. Jon takes the time to uncover the full picture, develop a strong defense strategy, and protect your side of the story from being distorted in court.

Whether you’re facing charges for simple assault, domestic violence, malicious wounding, or another violent crime, Jon focuses on preparing a defense that makes sense to the judge or jury. He works closely with clients to develop testimony, identify witnesses, and present evidence that supports your innocence, self-defense, or mitigation.

Weapons and Firearms Charges in Herndon

Virginia imposes serious penalties for weapons offenses, and charges involving firearms often come with harsh sentencing exposure. Jon Katz defends Herndon clients against allegations of unlawful possession, concealed carry violations, possession by a felon, and gun-related charges tied to other criminal offenses. His defense strategy often begins with challenging the basis for the traffic stop or search that led to the weapon’s discovery.

With a strong command of Fourth Amendment protections, Jon Katz regularly moves to suppress unlawfully obtained evidence. He also questions whether prosecutors can establish that you knew about or had control over the firearm. When you're charged with a gun offense in Fairfax County, Jon stands between you and the full weight of the justice system.

Defense Against Sex Crime Allegations

Being charged with a sex crime—whether it’s indecent exposure, sexual battery, or a more serious felony like rape—can destroy your reputation, career, and relationships, even before you step into court. Jon Katz approaches sex crime cases with urgency and discretion, knowing how important it is to investigate thoroughly and build a powerful defense before public judgment takes hold.

Jon reviews the credibility of the accusations, the conduct of the police, and the forensic evidence with precision. In many cases, he works with expert witnesses or mental health professionals to support the defense. Whether you're falsely accused or facing a complex situation, Jon defends without hesitation and without judgment.

Homicide and Manslaughter Defense

Being charged with murder or manslaughter in Virginia is life-altering. These cases demand a defense lawyer with deep experience, a strategic mindset, and an unflinching willingness to go head-to-head with the prosecution. Jon Katz brings all of that and more. He analyzes forensic evidence, autopsy findings, eyewitness statements, and every aspect of the government’s case with the goal of exposing doubt, bias, and error.

When someone’s future is on the line in a homicide criminal case, there is no room for hesitation. Jon stands beside his clients in their most critical hour and builds a defense aimed at saving their liberty and their life.