DUI Lawyer Ontario. If convicted, a DUI can permanently change your life for the worse. You're being accused of a crime; you're up against thousand dollar fines, years in jail, and more. You can face DUI charges even for just refusing to take the tests, and in some cases, refusing can give you even worse penalties. And it doesn't matter if it was alcohol, marijuana, or another substance affecting your ability to drive.
If you're facing these types of charges in CA, you need someone in your corner. Trying to defend yourself against the charges is a challenge nobody should have to face on their own, which is why the Law Offices of David S. Chesley is prepared to defend your freedom.
We are California's premier DUI defense lawyers and decades of experience fighting against these charges. When you choose us, you're getting a team of accomplished defense attorneys who know how to navigate the Ontario, CA, judicial system and get you the best outcome possible.
If you wait too long to build a defense, it could become too late. Speak with one of our attorneys without delay at (800) 755-5174 or send us a note online to start crafting your defense strategy today.
Ontario, CA, DUI Lawyer Traffic Stop Tips:
Most people don't plan to be pulled over, but knowing how to handle the situation is important for all Ontario, CA, residents. Here are four tips from a Ontario, CA, DUI Lawyer for you to use the next time a police officer stops you on the road:
Tip #1: Have Your Documents Ready
It's normal to be nervous after being pulled over and asked for your ID, registration, and insurance. If you're struggling to locate them and keep hold of them, the officer may think you're intoxicated. By following this tip, you avoid that risk.
Tip #2: If You or the Officer Smells Alcohol, Don't Speak
If there's a scent of alcohol on your person or in your vehicle, don't talk. You have the right to remain silent during any form of questioning. Protect yourself by keeping quiet until your lawyer arrives.
Tip #3: Refuse Voluntary Tests
In California, field sobriety tests are voluntary unless you are under the age of 21 or are on probation. You can still be arrested if the officer believes you've broken the law, but you're giving them less evidence this way. However, you can face consequences if you refuse a blood alcohol content test after you've been arrested.
Tip #4: Be Polite and Don't Argue
Refusing to cooperate with the police won't help — it will come back to bite you. You should be respectful for more than its own sake, though; it also helps your defense: By acting out or arguing, you are giving the police more evidence, which could contribute to their probable cause to arrest you.
What Happens After a DUI Arrest in Ontario?
California DUI Law allows an officer to arrest you without a BAC level over the limit, or even if you don't blow at all. Officers are able to arrest you this way because CA allows them to make subjective judgements, likely via field sobriety tests, then decide whether or not to arrest you based on how you do.
As soon as you're arrested, the CA legal system automatically begins the process for both a license suspension and criminal charges. After the arrest, be prepared for the following:
- Suspension: Your license suspension can go into effect at the time of the arrest – at that time, you will be given a 30-day, temporary license, while the officer will keep your regular license. While you're proceeding through the system, the police are informing the DMV about the arrest, at which point, you're officially facing a license suspension.
- Arraignment: After your arrest and before your release, you will go to court, and a prosecutor will announce what charges you're up against.
- DMV Hearing: While all of the criminal proceedings are going on, you'll need to start fighting for your license right away. This starts with arranging a DMV hearing, which you need to do within 10 days.
- Pretrial Motions: It's possible to be held in jail before your trial, but that's not very likely in DUI cases. While you're waiting for the trial, your Ontario DUI defense lawyer will file motions to strengthen your defense, such as ones to review the arrest footage, and a "blood split" motion to retest your blood sample.
- Negotiations With the Prosecutor: Inbetween pretrial motions, your DUI defense attorney will bargain with the Ontario district attorney to try and secure a favorable deal before a trial. But if the case goes to trial, your attorney should be building a defense now.
- Criminal Trial: Outside of extraordinary circumstances, it's rare for a DUI case to go to trial, but just in case it does, our team always crafts a trial-ready defense.
- Sentencing/Sealing: Depending on the outcome of your case, you may face some form of sentence. However, if you are found not guilty or enough time has passed, we may be able to help you clean your record.
Our DUI legal experts can provide guidance for any charge, on both the criminal defense and DMV side. Whatever stage in the process you're at, you can start with a call to our offices!
Ontario DUI Allegations and Criminal Cases vs. DMV Hearings
Ontario, CA, DUI charges include two separate fights: The criminal case and the administrative case. This will always require two separate defenses, but both cases can be fought by the same DUI defense lawyer.
Here are some things you need to know about both, and what our attorneys will do for your liberty and vehicular rights:
Ontario, CA, DUI Criminal Charges
Allegedly violating DUI laws will result in criminal charges. To fight them, you'll have to go through CA courts.
Most of the steps in a DUI criminal case are identical to that of another criminal charge – arrest, arraignment, pretrial activity, and possibly trial.
At the Law Offices of David S. Chesley, we listen to your side of the story and attack the accusations. We'll debate the legality of the traffic stop, question the legitimacy of the officer's subjective observations, look for contaminations or errors in blood, breath, or urine tests, and look for witness testimony and other proof that can tell a different story.
With our defense strategies, we are almost always successful at protecting our Ontario, CA, clients from jail time. Commonly, we'll negotiate a plea deal to reduce the charges, typically to a wet reckless, exhibition of speed, or reckless driving charge. We'll also work out probation over jail or prison time.
Ontario, CA, DUI License Suspension
While it might be tempting to focus exclusively on the criminal case, you also need to consider the DMV and your license suspension. This suspension goes into effect regardless of where you're at in the criminal process, and to effectively fight it, you'll need to request an administrative hearing within ten days of your arrest.
The criminal charges are not always relevant in the DMV hearing. In fact, your license can still be suspended even if you do not receive a criminal conviction. Instead, the hearing is to determine if you were legitimately arrested, if your BAC was at or above 0.08, the legal limit, or, if you refused to blow, whether or not you were properly informed of the consequences. These hearings have serious consequences that require an expert Ontario, CA, DUI lawyer to navigate. At the hearing, we'll argue over the legitimacy of the stop, the arrest, and the BAC reading.
If it's been more than ten days after your arrest, though, you're out of luck. Outside of rare cases, you don't get another chance to request that hearing. This is why it's important to contact a Ontario DUI defense attorney without delay after the arrest.
Sentence You Could Face for a DUI in Ontario, CA
Ontario, CA, DUI criminal penalties can permanently affect your life – even though some are misdemeanors, you could still be sentenced to a year in jail, or six months for a first offense.
On this table, you can review the different penalties you could be looking to avoid, depending on the allegations you're facing:
| DUI Criminal Charge | Jail/Prison Time | Fine |
|---|---|---|
| First Time DUI | 48 Hours to 6 Months | Up to $1,000 |
| Second Time DUI | 96 Hours to 1 Year | Up to $1,000 |
| Third Time DUI | 120 Days to 1 Year | Up to $1,000 |
| Fourth Time DUI (Felony) | 16 Months to 3 Years | Up to $1,000 |
| DUI Injury (Misdemeanor) | Up to 1 Year | Up to $1,000 |
| DUI Injury (Felony) | Up to 4 Years | Up to $5,000 |
| DUI Manslaughter (Misdemeanor) | Up to 1 Year | Up to $1,000 |
| DUI Manslaughter (Felony) | 4, 6 or 10 Years | Up to $10,000 |
On top of whatever sentence you receive in Ontario court, you have to endure several collateral consequences, such as increased insurance premiums and career setbacks.
DUIs and Immigration
DUI immigration consequences can be devastating. On the bright side, most first-time DUIs at this time will not result in deportation. The bad news is that if certain circumstances apply, like DUIs causing injury or repeat offenses, you can qualify for deportation. What's worse, if H.R.875 passes, any DUI conviction will qualify an immigrant for deportation. For individuals working on the naturalization process, even if you aren't deported, it can count against your "good moral character," which you need to establish before becoming a citizen.
These accusations can be intimidating, but they are not the end. Your Ontario, CA, immigration lawyer can give you practical advice on what comes next. At the Law Offices of David S. Chesley, can provide assistance with all of your legal needs, not just against criminal accusations: We'll explore diversion programs to protect your record, fight to keep you in the country, and offer expert advice as you apply for citizenship.
After the Case: Expungement/Sealing
Whether you're found guilty or not guilty, it's natural to want to move on and leave this in the past. You'll find, though, that your arrest and/or criminal record won't go away on its own. Depending on your case outcome, there's a chance you're eligible to either expunge or seal your records. A Ontario, CA, DUI defense lawyer can help you with these processes, and give you an opportunity to clean your record.
Top DUI Defense Attorneys in Ontario: What You Need to Know
When you're facing DUI charges, it's key to pick the right lawyer to fight for you. Your team needs the abilities, background, and ties to secure a positive outcome for your case. When evaluating DUI lawyers in Ontario, CA, you want to judge the following:
- Experience: As defense attorneys, and also prosecutors. At the Law Offices of David S. Chesley, our team includes former judges, prosecutors, and police, totalling over five decades of experience.
- Availability: DUI allegations can happen any time, day or night. Our team is prepared to help you 24/7.
- Relationships: Part of getting a positive plea deal is knowing the right people. We know how to connect with the prosecutors in Ontario and all throughout CA.
- Reputation: Both in the community and in the legal sphere. The Law Offices of David S. Chesley is proud to have received top ratings from several legal evaluators and to be recognized as the top DUI lawyer in California.
- Track Record of Success: You want to work with an attorney who has successfully fought DUI charges in the past. We have. In fact, 95% of our DUI cases result in no jail time.
Our recent DUI Case results speak for themselves. And we'd be proud to represent you as well.

DUI Case Types We Defend Against in Ontario
Administrative, criminal, or anything else related to DUIs in Ontario, CA – all of our DUI defense attorneys are prepared stand by you against the charges.
Below are some of the DUI charges we typically defend:
- Boating Under the Influence
- Breathalyzer Test
- Commercial Driver CDL DUI
- Disorderly Conduct
- Disturbing the Peace
- DMV Hearing Defense
- Driving with a Suspended License
- Driving Without a License
- Driving Without Insurance
- Drug DUI
- Drunk in Public
- DUI Alcohol
- DUI Accident Defense
- DUI and Professional Licenses in California
- DUI Blood Test Defense
- DUI Causing Injury
- DUI Checkpoint Defense Attorney
- DUI Defense Costs
- DUI Expungement in California
- DUI Immigration Consequences
- DUI in Construction Zones and School Zones
- DUI License Reinstatement
- DUI Probation Violation
- DUI Process – What to Expect
- DUI Marijuana
- DUI Prescription Drugs
- DUI Refusal Cases
- DUI Trial – Jury Trial Defense
- DUI Penalties
- DUI with Child Passenger
- Evasion
- Exhibition of Speed
- Felony DUI
- Field Sobriety Tests
- First-Time DUI
- Fourth DUI Felony Escalation
- Hit and Run
- Hit and Run DUI
- Hit and Run with Injury or Death
- Ignition Interlock Device Violations
- Illegal Traffic Stop – Probable Cause Defense
- Medical Conditions as a Defense to DUI
- Misdemeanor vs Felony DUI Overview
- Mouth Alcohol Defense to DUI
- Out-of-State DUI
- Public Intoxication
- Reckless Driving
- Rising Blood Alcohol Defense
- Street Racing
- Second Time DUI
- Third DUI California
- Title 17 Violation of Breath and Blood Test Procedures Defense
- Underage DUI
- Watson Murder / DUI Murder
- Wet Reckless
DUI Defense Strategies in Ontario, CA
Every DUI case needs a defensive strategy, and our Ontario, CA DUI defense lawyers are here to help you find the right one. Choosing the correct defense for your particular circumstances is essential in finding the best possible outcome. Below are some of the most effective ones.
Challenge the Legitimacy of the Traffic Stop
If law enforcement made a mistake while conducting their investigation, we can challenge the evidence, and even the legitimacy of the case itself. This defense is effective if, for example, the officer did not observe you for the full 15-minute period required before asking you to take a breath test.
Show Issues With Chemical Tests
Chemical tests that measure the amount of alcohol in your blood, breath, or urine are strong evidence, but are not infallible. Our team will highlight the ways that these tests can give false readings, introduce alternative evidence when possible, and highlight any errors in the chain of custody.
Challenge Field Sobriety Tests
Field sobriety tests, like 'horizontal gaze nystagmus,' are a typical part of any traffic stop that turns into a DUI investigation. But these tests are subjective. Your local DUI lawyer will inspect any records of the test and look for expert analysis that will show your performance in a more favorable light.
Explain BAC With Medical Conditions
Maybe there were no mistakes with your blood, breath, or urine test, and your BAC was .08 or higher. While properly conducted BAC tests are hard to disprove, there are still ways to fight it. We can examine your diet and medical conditions to find alternative explanations.
Get Rapid Assistance – Talk To Our Ontario DUI Defense Attorneys TODAY
After a DUI arrest, you'll hardly get a chance to catch your breath. Your license is suspended, there could be interrogations, you're told you have a court date…it's easy to feel overwhelmed. To fight through the allegations, your first step is to get in touch with an attorney immediately.
Don't sit by and watch the evidence mount against you. Don't let your license go without a fight. Don't try to handle it on your own. Hire the Law Offices of David S. Chesley to defend you.
We're experts at defending all Ontario, CA DUI charges. We're standing by to answer your call right now and will begin protecting your license and your rights immediately. Reach out to us now at (800) 755-5174 or set up an appointment online for a free case review.
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