Most people charged with DUI in California assume the case was decided when the breath instrument printed a number above 0.08. It was not. The government still has to prove that you drove, that the stop and arrest were lawful, that the chemical test followed the regulations, and that the result reflects your blood alcohol while you were driving. Each of those is a place where the case can shrink or fall apart.
This guide covers the grounds for a dismissal, what the reduced charges mean, how prosecutors decide, and what a court result does to the separate DMV suspension.
The Two Counts in a California DUI Case
A standard DUI is charged as two counts under Vehicle Code section 23152. Subdivision (a) alleges that you drove while under the influence, meaning alcohol impaired your ability to drive with the caution of a sober person. Subdivision (b) alleges a blood alcohol concentration of 0.08 percent or more. The (a) count needs no number, the (b) count needs no proof of impairment, and you can only be sentenced on one.
They fail differently. A chemical test problem weakens the (b) count and leaves the (a) count resting on the officer's observations; a sober-looking video weakens the (a) count while the number stands alone. A reduction usually means both counts have a soft spot. A dismissal usually means one problem, most often the stop, took both down at once.
How a DUI Gets Dismissed: The Stop and the Arrest
The most common route to an outright dismissal is a motion to suppress under Penal Code section 1538.5. An officer needs reasonable suspicion of a violation to stop your car. If the stop rested on a hunch or on a violation the video does not show, the court can suppress everything that followed, including the chemical test. With that evidence gone, the prosecution ordinarily dismisses.
The same motion reaches the arrest, which requires probable cause, and sobriety checkpoints, which must meet their own requirements under California law, including supervisory approval and a neutral formula for which cars are stopped.
Miranda is narrower than people expect: roadside questions before an arrest generally do not require warnings, and a violation keeps post-arrest statements out but rarely ends a DUI case on its own.
Title 17 Chemical Test Violations
Title 17 of the California Code of Regulations governs how breath and blood samples are collected, analyzed, and documented. A violation does not automatically exclude the test, since the prosecution may try to prove reliability another way, but it gives a jury a reason to doubt the number and a prosecutor a reason to offer a reduction. At the DMV hearing it can end the suspension. The most common defects:
- No continuous 15-minute observation before the breath test, during which you must not eat, drink, smoke, vomit, or regurgitate
- Accuracy checks on the breath instrument not done at least every 10 days or 150 tests, whichever comes first
- A blood draw by an unauthorized person, with an alcohol-based skin swab, without the required preservative and anticoagulant, or without a documented chain of custody
- A sample stored unrefrigerated or with a defective seal, so fermentation could produce alcohol that was never in your blood
Rising Blood Alcohol, No Driving, and Medical Defenses
Rising blood alcohol. Alcohol takes time to absorb, so a test taken an hour after the stop can show a higher level than you had while driving. Vehicle Code section 23152(b) presumes that a test within three hours of driving reflects your level at the wheel, but a toxicologist working from the timeline of your drinking can rebut that presumption. This matters most near 0.08.
No driving. The prosecution must prove that you drove, which a person asleep in a parked car, or contacted at home after a reported collision, puts in doubt.
Mouth alcohol and medical conditions. Breath instruments assume no alcohol in the mouth, so belching, acid reflux (GERD), a hiatal hernia, or dental work that traps liquid can produce a falsely high reading. The 15-minute observation exists to rule this out, which makes a missed observation and a documented reflux condition a strong combination.
What a Wet Reckless Means
A wet reckless is reckless driving under Vehicle Code section 23103, entered under section 23103.5 with a notation that alcohol was involved, and it is the most common reduction of a DUI in California. It is priorable, so a DUI within ten years is sentenced as a second offense, it adds two DMV points, and it does nothing about the separate DMV suspension. Against a first-offense DUI it typically means:
- Lower fines: the reckless driving range starts well below the $390 minimum for DUI
- A shorter program: usually 12 hours of alcohol education, rather than the three-month program a first DUI conviction requires
- No suspension triggered by the conviction itself under Vehicle Code section 13352, which a DUI conviction carries
- Lower maximum jail exposure (90 days rather than six months) and no mandatory ignition interlock tied to the conviction on a first offense
Dry Reckless, Exhibition of Speed, and Other Reductions
A dry reckless is the same statute, Vehicle Code section 23103, without the alcohol notation. It is a misdemeanor with two DMV points, but it is not a DUI prior, requires no DUI program, and carries no alcohol label for insurers and licensing boards. Prosecutors offer it much less often, usually where the chemical test has a real problem.
Exhibition of speed under Vehicle Code section 23109(c) is a misdemeanor that says nothing about alcohol and is not a DUI prior; it appears when the driving pattern prompted the stop and the alcohol evidence is weak. Drunk in public under Penal Code section 647(f) comes up rarely, where driving itself is in doubt, and carries no DMV points or license consequence.
How Prosecutors Decide Whether to Reduce a DUI
In San Diego County, misdemeanor DUIs inside the City of San Diego are prosecuted by the City Attorney, and those elsewhere in the county, along with all felonies, by the District Attorney. A documented defect in the stop or the test is what produces an offer. The factors are consistent:
- Blood alcohol level. A result near 0.08 is the strongest candidate, and 0.15 or above is treated as aggravated
- Prior record. A prior DUI or wet reckless within ten years makes a reduction uncommon
- A collision or property damage, even when nobody was hurt
- Refusal. It removes the number but adds a one-year DMV suspension and a sentencing enhancement
- A child under 14 in the car, and speed at the time of the stop
- The evidentiary problems your lawyer has documented, the one factor you can still change
The DMV Hearing Is a Separate Track
The arrest opened an administrative case at the DMV, independent of the prosecutor. You have ten days from the arrest to request a hearing, or the suspension takes effect on its own. The hearing asks whether the officer had reasonable cause to believe you were driving under the influence, whether the arrest was lawful, and whether your blood alcohol was 0.08 or more, and it lets you cross-examine the arresting officer months before trial.
The reverse surprises people. A dismissal or reduction in court does not automatically end the DMV suspension; if you lost the hearing or never requested one, the four-month first-offense suspension runs regardless. An acquittal after trial is different: Vehicle Code section 13353.2 directs the DMV to set aside the suspension when you are found not guilty. A prosecutor's dismissal or a plea to a lesser charge does not trigger it.
Realistic Expectations for a First Offense
The most negotiable DUI case is a first offense with a result near 0.08, an ordinary stop, no collision, no refusal, and a cooperative defendant. Those cases are regularly resolved as a wet reckless, and where the test or the stop has a documented problem, sometimes as a dry reckless or less. Above 0.15, with a crash, or with a prior, the realistic goal shifts from the charge to the sentence.
Outright dismissals are less common than reductions and almost always come from a suppression motion or an unprovable test result. Every case is different and prior results do not guarantee a similar outcome.
Misdemeanor DUI cases in San Diego County are heard at the Central Courthouse at 1100 Union Street or at the Vista, El Cajon, or Chula Vista branches, and most reductions come once the defense has the full discovery in hand.
Expungement Under Penal Code Section 1203.4
If the case ends in a conviction, for DUI or a wet reckless, you can petition under Penal Code section 1203.4 once probation is complete, or earlier if probation ends early under section 1203.3. The court withdraws the plea and dismisses the case, and for most private employment applications you can then say you were not convicted.
The limits matter. The dismissal does not erase the prior: a DUI within ten years of the earlier violation is still a second offense. The DMV keeps the conviction on your driving record for ten years under Vehicle Code section 1808, and you must still disclose it when applying for a state license or public office.
What to Do Next
Request the DMV hearing within ten days of the arrest and ask for a stay. Write down what you remember about the stop and the tests, and what you ate and drank and when. Keep receipts and any video that fixes the timeline. Do not discuss the facts with the officer, the DMV, or anyone on a recorded jail line.
Then have the record examined. The Law Office of Marc S. Kohnen is at 425 Tenth Avenue in downtown San Diego, near the central courthouse, and Marc Kohnen has defended DUI cases in San Diego County since 2008. The line is answered 24 hours at (619) 398-2500. If you are inside the ten-day window, say so when you call.
Questions People Ask
What is the most common way a DUI gets dismissed?
A suppression motion under Penal Code section 1538.5 challenging the stop. If the officer lacked reasonable suspicion to pull you over, the court excludes the evidence that followed, and the prosecution ordinarily dismisses because it cannot prove either count. The second most common route is a chemical test problem serious enough that the 0.08 count cannot be proven, which more often produces a reduction than a dismissal.
Can a first-time DUI be reduced?
Yes, and a first offense is the case most likely to be reduced. A first-time DUI with a result near 0.08, no collision, no refusal, and an ordinary stop is regularly resolved as a wet reckless under Vehicle Code section 23103.5, and where the stop or the test has a documented defect the reduction can go further. The higher the result and the more aggravating facts, the more the reduction depends on a specific evidentiary problem. Every case is different and prior results do not guarantee a similar outcome.
What is the difference between a wet reckless and a dry reckless?
Both are reckless driving convictions under Vehicle Code section 23103. A wet reckless carries a notation under section 23103.5 that alcohol was involved, which makes it a prior if you are convicted of another DUI within ten years and requires an alcohol education program. A dry reckless has no alcohol notation: it is not a DUI prior, requires no DUI program, and reads as a driving offense rather than a drinking one. Both carry two DMV points.
If my DUI is dismissed, do I get my license back?
Not automatically. The DMV suspension is a separate administrative action that you had to contest by requesting a hearing within ten days of the arrest. If you lost that hearing or never requested it, the suspension stands even if the prosecutor dismisses the case or you plead to a wet reckless. The exception is an acquittal: Vehicle Code section 13353.2 directs the DMV to set aside the suspension when you are found not guilty after trial. A refusal suspension is separate again and survives a dismissal.
How long does a DUI stay on my record in California?
A DUI conviction, and a wet reckless, counts as a prior for ten years from the date of the violation, so a second offense inside that window is sentenced under Vehicle Code section 23540. The DMV shows the conviction on your driving record for ten years under Vehicle Code section 1808. The court record is permanent unless you obtain relief under Penal Code section 1203.4 after probation, which changes the record to show a dismissal but does not remove the DMV entry or erase the prior for a later DUI.
This guide is general information about California law, not legal advice about any specific case. Legally reviewed by Marc S. Kohnen, Attorney at Law, State Bar of California #255303, defending San Diego since 2008.
Free, confidential case evaluation, available 24 hours at (619) 398-2500.