Can a DUI Case Be Dismissed Because of an Illegal Traffic Stop in Bakersfield?

Most DUI arrests begin the same way: flashing lights appear in the rearview mirror and a driver pulls over.

But police cannot simply stop any vehicle they choose and begin looking for evidence of DUI.

A traffic stop must have a lawful basis.

If it did not, evidence obtained after the stop may potentially be challenged.

Why did the officer stop the vehicle?

An officer may initiate a traffic stop after observing a suspected traffic violation or other circumstances that provide a lawful basis for the detention.

Common reasons cited in DUI cases may include:

• Speeding
• Weaving or unsafe lane changes
• Running a red light or stop sign
• Equipment violations
• Driving without headlights
• Other observed traffic violations

The specific reason given for the stop should be examined carefully.

Suspicion of DUI is not always required before the stop

An officer does not necessarily have to suspect DUI before pulling a vehicle over.

For example, an officer may initially stop someone for an alleged traffic violation and then begin a DUI investigation after observing signs the officer believes indicate alcohol or drug impairment.

The question is whether the original detention itself was lawful.

Video evidence may help determine what actually happened

Dashcam, body-worn camera, surveillance, or other video evidence may be particularly important when the reason for the traffic stop is disputed.

For example, an officer's report may claim that a vehicle was weaving.

Available video may help show:

• How the vehicle was actually being driven
• Road and traffic conditions
• When the officer began following the vehicle
• What occurred immediately before the stop
• Whether the officer's description matches the recording

The police report should not necessarily be the end of the inquiry.

What happens if the stop was unlawful?

If a court determines that a traffic stop violated the driver's constitutional rights, the defense may seek to prevent evidence obtained as a result of that unlawful detention from being used.

That can be significant in a DUI case because much of the prosecution's evidence may have been gathered only after the vehicle was stopped.

Whether that ultimately results in dismissal depends on the circumstances and the remaining evidence.

An arrest does not prove the stop was legal

Drivers sometimes assume that because they were arrested—and perhaps even had a breath or blood test showing alcohol or drugs—the legality of the original stop no longer matters.

That is not necessarily true.

The events leading up to the DUI investigation may be just as important as what happened afterward.

What you should do now

If you believe you were stopped without a valid reason before a Bakersfield DUI arrest:

1. Write down exactly what happened before the officer activated the emergency lights.
2. Preserve any dashcam or other video evidence you may have.
3. Keep all documents provided after the arrest.
4. Do not assume chemical-test evidence makes the traffic stop irrelevant.
5. Speak with a DUI lawyer who can examine the legal basis for the stop.

Reviewing how the investigation began can be an important part of evaluating a DUI case.

Speak with a Bakersfield DUI lawyer today

If you are facing DUI charges in Bakersfield, Martens Law Firm can review the traffic stop and other evidence, explain your legal options, and help protect your rights.

📞 Call (661) 590-0385 for a free consultation.

Written by Martens Law Firm