1. What Evidence Matters before the Chemical Test?
After an arrest, the report may tell only part of the story. Compare its timeline with video, witness accounts, and dispatch records to identify how the stop became an arrest.
Review the Stop, Driver Identification, and Arrest
Traffic stops generally require reasonable suspicion; arrests require probable cause.
- Reason for the stop: Compare the claimed traffic violation with available dashcam footage and dispatch records.
- Driver identification: Examine witness descriptions, vehicle location, and who officers actually observed driving.
- Arrest grounds: Compare reported symptoms, statements, and test observations with the arrest timeline.
An unlawful detention may raise Fourth Amendment issues, but suppression is not automatic. A broader DUI defense review can address criminal motions beyond the initial record check.
Separate Roadside Exercises from Chemical Evidence
Field exercises do not measure blood alcohol. Lighting, health, and instructions can affect performance.
| Evidence | What to Examine |
|---|---|
| Field sobriety exercises | Instructions, surface, footwear, health, and video |
| Preliminary alcohol screening | Test timing, device records, and applicable consent rules |
| Officer observations | Statements, reported symptoms, and consistency with footage |
| Dispatch and camera files | Stop sequence, driver identification, and arrest timing |
Field sobriety exercises
- What to ExamineInstructions, surface, footwear, health, and video
Preliminary alcohol screening
- What to ExamineTest timing, device records, and applicable consent rules
Officer observations
- What to ExamineStatements, reported symptoms, and consistency with footage
Dispatch and camera files
- What to ExamineStop sequence, driver identification, and arrest timing
Vehicle Code § 23612(i) requires an officer requesting preliminary alcohol screening (PAS) to explain its purpose and the right to refuse. Different rules apply to drivers under 21 or on DUI probation. Taking PAS does not replace a required post-arrest chemical test.
2. How Are Breath, Blood, and Refusal Evidence Evaluated?
Vehicle Code § 23152 governs alcohol- and drug-impaired driving and certain alcohol thresholds. Chemical evidence needs context: the collection procedure, the timing, and the records linking the sample to the driver.
Check Test Timing, Collection, and Laboratory Records
Check the reported result against the test time, sample, and driver.
- Breath evidence: Examine instrument checks, operator records, duplicate results, and the required 15-minute observation period.
- Blood evidence: Review collection time, sample identification, storage, laboratory methods, and chain of custody.
- Drug allegations: Check the substances identified, toxicology findings, and observed impairment; alcohol thresholds do not define every drug-DUI charge.
The relationship between testing and driving time may require expert analysis. The firm's blood alcohol content material examines how numerical results may be disputed.
Identify Which Test Was Refused and What Warning Was Given
Vehicle Code § 23612 governs post-arrest chemical tests; choices and warnings depend on the circumstances.
- Test stage: Distinguish a roadside preliminary screening request from a post-arrest chemical test.
- Warning: Review the officer's explanation of license consequences and test choices.
- Response: Compare audio, written reports, and any claimed failure to complete testing.
For drivers 21 or older, a qualifying first post-arrest refusal generally leads to a one-year DMV suspension; specified prior offenses can increase the period. The DMV action does not require a criminal conviction. Related legal issues appear in the firm's DUI test refusal resource.
3. What Happens at the DMV Hearing and Criminal Court?
Administrative Per Se (APS) hearings address licensing, while prosecutors handle criminal charges. A court date does not preserve DMV hearing rights.
Read the Suspension Order and Request the DMV Hearing
Check the receipt date on the Order of Suspension and Temporary License. Its deadline differs from the court date.
- Hearing request: Request an APS hearing from DMV Driver Safety within 10 days of receiving the suspension or revocation order.
- Temporary license: The order may provide 30 days of driving authority if the driver otherwise remains eligible.
- Hearing evidence: Request the police report and test documents, and examine lawful arrest, driving, test results, or refusal issues as applicable.
DMV may stay the action if it cannot hold a timely hearing. Confirm any stay in writing.
Check the Criminal Case and County Filing Location
Criminal cases generally proceed in the Superior Court for the alleged offense location.
- Los Angeles: Use the court notice and criminal case inquiry to check the courthouse and scheduled appearance.
- Orange: The citation or arraignment letter identifies the Justice Center; check the court calendar before appearing.
- San Diego: Verify the assigned courtroom and bring the case number, citation, and release papers if applicable.
State DUI rules are common across these counties, while courthouse assignments and calendars differ. Preserve video requests and discovery correspondence separately from DMV notices.
4. Frequently Asked Questions
Can someone be charged with DUI when the BAC is below 0.08%?
Yes. Vehicle Code § 23152(a) addresses impaired driving even without a BAC of 0.08%. Evidence of drug impairment may also support a separate allegation.
Can a driver ask for an independent chemical test?
Yes. After a post-arrest breath test, Vehicle Code § 23614 provides an opportunity to give a retained blood or urine sample for possible later analysis. Separate additional testing may also be arranged under § 23158(b).
Can I obtain body-camera footage before the first court hearing?
Access depends on whether prosecutors have filed charges, discovery procedures, and record-retention rules. Preserve the request early because footage may not be retained indefinitely.
Does an out-of-state driver's license prevent DMV action?
No. DMV may act against the privilege to drive in the state. Effects on the home-state license depend on that state's rules and interstate reporting.
5. Discuss DUI Evidence and Hearing Dates with SJKP Attorneys
DMV notices and court dates require separate attention. SJKP's attorneys can review stop evidence, testing records, and deadlines. Contact SJKP with the paperwork for a focused legal review.
27 Oct, 2026
