Being arrested for DUI in San Diego can feel discouraging and overwhelming. Many people assume that once they’ve been charged, a conviction is inevitable. In reality, DUI charges can often be challenged, and the outcome of your case may depend heavily on the details surrounding your stop, arrest, and testing.

California DUI cases are complex, and law enforcement and testing procedures must follow strict legal standards. When mistakes are made, those errors can become the foundation of a strong defense.

At the Law Offices of David A. Simon, DUI cases are handled with careful attention to detail and a personalized defense strategy designed to protect your rights and your future.

A DUI Arrest Does Not Automatically Mean a Conviction

A DUI charge is an accusation—not a final determination of guilt. Prosecutors must prove every element of the charge beyond a reasonable doubt. That includes showing that:

• The traffic stop was lawful
• The arrest was supported by probable cause
• Any field sobriety, breath, or blood tests were properly administered
• Your blood alcohol concentration (BAC) met the legal threshold at the time of driving

If the prosecution cannot meet this burden, the case may be reduced or dismissed.

Common Ways DUI Charges Are Challenged

Unlawful Traffic Stops

Police must have a valid legal reason to pull you over. If the stop was based on vague suspicion or lacked justification, evidence obtained afterward may be excluded.

Field Sobriety Test Issues

Field sobriety tests are subjective and can be affected by fatigue, injuries, medical conditions, uneven road surfaces, or poor instructions from the officer.

Breathalyzer Errors

Breath tests are not foolproof. Results can be impacted by:

• Improper calibration or maintenance
• Operator error
• Certain medical conditions
• Environmental factors

Even small inaccuracies can significantly affect test results.

Blood Test Problems

Blood samples must be collected, stored, and tested properly. Breaks in the chain of custody, contamination, or lab errors may compromise results.

DUI and DMV Cases Are Separate

After a DUI arrest, you face two cases at once:

1. A criminal DUI case in court
2. A DMV administrative action that can suspend your license

Winning or losing one does not automatically decide the other. Acting quickly is critical, as you only have 10 days to request a DMV hearing.

Why Legal Representation Matters

DUI laws in California are technical and unforgiving. A knowledgeable DUI defense attorney can:

• Analyze police reports and body cam footage
• Review testing procedures for errors
• Challenge constitutional violations
• Represent you at DMV hearings
• Negotiate for reduced charges or alternative outcomes

Attorney David A. Simon works directly with clients, focusing exclusively on DUI defense and building tailored strategies for each case.

Take Action Early to Protect Your Rights

Time is one of the most important factors in a DUI case. Evidence can disappear, deadlines can be missed, and options can narrow if action is delayed.

If you’ve been charged with DUI in San Diego, you may have defenses available—but protecting those defenses starts early.