Defense Lawyer
OUI / DUI Drunk Driving Defense Lawyer in Greater Boston
Massachusetts OUI, DUI, and DWI Defense Attorney: Navigating Penalties with Drunk Driving Expert Attorney
When you are charged with Operating Under the Influence (OUI) in Massachusetts or Greater Boston—commonly known as DUI or DWI—you are not just fighting a traffic ticket; you are defending your livelihood and your future. In these high-stakes cases, the skill, smarts and experience your criminal defense attorney is the single most important factor in the outcome.
At Serpa Law Office, we bring a level of expertise that few can match: Attorney Serpa maintains a perfect record of “Not Guilty” verdicts in OUI jury trials on the Massachusetts District Court and the Boston Municipal Court. This history of success is built on a deep understanding of Massachusetts criminal procedure, forensic science, and a serious commitment to protecting the rights of the accused in Greater Boston and throughout Eastern and Central Massachusetts.
An arrest is an opinion; a “Not Guilty” verdict is a fact. While Massachusetts has some of the strictest drunk driving laws in the nation, these cases are defensible, winnable, and frequently resolved in favor of the defendant when handled with intelligence, courtroom skill and precision.
The Two Fronts: Administrative RMV Sanctions vs. Criminal Penalties
In Massachusetts, an OUI charge triggers two distinct legal consequences that occur simultaneously. Navigating both requires a sophisticated defense strategy.
1. Administrative Sanctions (The RMV)
The Registry of Motor Vehicles (RMV) handles “implied consent” violations. If you fail a Breathalyzer (a BAC of .08% or higher, or .02 or higher if you’re under 21) or refuse the test entirely, your license is suspended immediately.
The courts have ruled that these RMV sanctions are administrative remedies—not criminal “punishment.” This is a critical distinction because it means “double jeopardy” does not apply. You can face a suspension from the RMV just for the arrest, and then face a second suspension from the court if you are convicted.
2. Criminal Penalties (The Court)
These are the penalties imposed by a judge following a plea or a trial. They include fines, probation, mandatory education programs, and potential incarceration whether in the Massachusetts House of Correction or State Prison. Because the stakes are so high, our goal is always to avoid a conviction entirely.
What are the Punishments for OUI/DUI/DWI in Massachusetts?
The Commonwealth of Massachusetts uses a “progressive” penalty system, meaning the consequences escalate sharply with every subsequent offense.
First-Offense OUI
A first-time OUI arrest can be daunting, but it often allows for the most flexibility in defense.
- Incarceration: Potential for up to 2.5 years in a House of Correction.
- Fines & Fees: $500 to $5,000, plus mandatory assessments (such as the $250 Head Injury fee).
- License Suspension: 45 to 90 days if resolved through a “24D disposition,” or 1 year for a standard conviction.
- Education: Mandatory attendance at a weekly alcohol awareness program.
- The Goal: We strive to have these charges dismissed or reduced, ensuring your record remains as clean as possible.
Second-Offense OUI
A second offense is significantly more serious, carrying a mandatory minimum 30-day jail sentence.
- Alternative Disposition: We can often advocate for a more lenient “14-day inpatient” treatment program in lieu of traditional jail time.
- Ignition Interlock Device (IID): Mandatory for any hardship or reinstated license.
- The “Cahill” Disposition: If your first offense is more than 10 years old, we may be able to treat the second offense as a “first” for sentencing purposes, significantly reducing the impact on your life.
Third-Offense and Felony OUI
A third OUI conviction is a felony in Massachusetts.
- Mandatory Jail: A minimum of 150 days in jail is required by law.
- License Loss: An 8-year license suspension.
- Fourth/Fifth Offense: These carry mandatory state prison sentences (up to 5 years) and, in the case of a fifth offense, a permanent lifetime license revocation.
OUI Drugs (Marijuana and Controlled Substances)
The law treats OUI-Drugs similarly to alcohol, but the prosecution faces a much higher burden of proof. There is no “Breathalyzer” for drugs. The Commonwealth must prove that a specific substance was in your system and that it actually impaired your ability to drive safely. We have successfully defended numerous OUI-Drug cases by challenging the subjective observations of DRE “Drug Recognition Experts.”
Motor Vehicle Homicide
This is a tragic and complex felony charge. A conviction carries a mandatory prison sentence. If you are facing this charge, you need a trial attorney with a proven track record of winning in front of a jury. These cases often hinge on accident reconstruction and forensic toxicology, areas where our office excels.
Why Our “Not Guilty” Record Matters for You
Most OUI cases rely on the subjective observations of a police officer—how you looked, how you spoke, and how you performed on Field Sobriety Tests (FSTs). These tests are designed for you to fail. They are often administered on uneven pavement, in the dark, and under extreme stress.
When we take a case to trial, we dismantle the prosecution’s evidence piece by piece:
- Challenging the Initial Stop: Was there actually a legal reason to pull you over?
- Invalidating Field Sobriety Tests: Were the tests administered according to strict NHTSA guidelines?
- Attacking Breathalyzer Accuracy: We scrutinize the maintenance records and calibration of the machine used in your case.
Our perfect record in OUI trials isn’t a result of luck; it’s a result of meticulous preparation and a refusal to accept a “guilty” plea when a “not guilty” verdict is possible.
Underage OUI (Drivers Under 21)
Massachusetts has a “Zero Tolerance” policy for younger drivers.
- The .02 Standard: An underage driver only needs a Blood Alcohol Content (BAC) of .02% to trigger a 210-day license loss.
- Refusal Penalties: If a driver under 21 refuses a breath test, they face an automatic 3-year license suspension from the RMV. This is separate from any court-ordered penalties.
Contact a Proven Greater Boston OUI Defense Lawyer
If you have been arrested for drinking and driving, time is short. You have a limited window to appeal certain RMV suspensions, and the sooner we can secure video evidence (such as booking room or cruiser footage), the stronger your defense will be.
Don’t leave your freedom to chance. Put your case in the hands of an attorney who knows how to win.
Call or Contact Serpa Law Office today for a free consultation.
Will my OUI DUI case be dismissed if the officer does not read my Miranda rights?
Not automatically. Miranda rights only protect you from self-incriminating statements made during a custodial interrogation. While an officer’s failure to read these rights may allow us to ask a judge to suppress statements made when you are in police custody or not free to leave, it does not automatically dismiss the physical evidence or the initial traffic stop itself.
In Massachusetts, you have the right to decline the breathalyzer test at the station, though refusal triggers an automatic RMV license suspension starting at 180 days. However, refusing the test denies the prosecution the primary scientific metric required for a conviction, frequently providing us a stronger position to defeat the underlying OUI charge at trial.
Yes. In Massachusetts, you can refuse to take field tests during an OUI stop with no effect on your drivers license. Your refusal can never be used against you a trial. This means that the jury will never know you refused. Also, an officer cannot force or coerce you into taking field tests. If an officer does, the results can also be excluded from you OUI trial.
Sometimes. A completed CWOF avoids a formal guilty conviction, but it still triggers a license suspension and requires that you admit to the offense (“admission to sufficient facts.”) It will also count as a first offense for future OUIs. For some licensed professionals, noncitizens, commercial drivers (CDL holders), or individuals with security clearances, a CWOF can be seen as a guilty conviction and can damage a career.
Not usually. Law enforcement cannot conduct a warrantless search of your vehicle simply because they stopped you for suspected OUI. However, they can search if they have probable cause of evidence of an additional crime or if you allow them to (consent). We systematically challenge the constitutionality of vehicle searches and file motions to suppress any illegally obtained evidence.
Only you and your lawyer can make that decision. Going to trial must be based on careful consultation with your lawyer. The strength of their case, the absence of a Breathalyzer test and the quality of video evidence are all factors in the decision. Preparing for a jury trial from day one provides strong negotiating leverage. When the prosecution recognizes trial readiness to dismantle their evidence in court, we secure a superior position to demand dismissals or definitive resolutions.
OUI suspensions in Massachusetts are both administrative (RMV suspensions for Breathalyzer refusals/failures) and punitive (judicial suspensions for CWPF24D and convictions). We cover them here. A judge can give order the RMV to reinstate your license after an administrative suspension (breath test refusal etc.) if your case is dismissed or you are found not guilty.











