The Complete Guide to DUI Defense in South Carolina

The flashing blue and red lights in your rearview mirror can be terrifying. A moment of uncertainty can quickly turn into a serious legal problem. If you’ve been pulled over and charged with a DUI in South Carolina, it is crucial to understand what comes next. This guide is your first step toward clarity during a difficult time.
A DUI charge is more than just a traffic ticket; it carries severe penalties that can impact your freedom, finances, and future. A conviction can lead to jail time, heavy fines, the loss of your driver’s license, and a permanent mark on your criminal record. The situation can feel overwhelming, leaving you unsure of where to turn.
This guide will walk through the entire DUI process in South Carolina, from the initial arrest to potential defenses and consequences. The goal is to provide you with essential knowledge. Understanding your rights and the legal process is the first step in building a strong defense. For residents of Rock Hill, SC, and the surrounding areas, having a clear plan is vital. The Law Offices of Geoffry M Dunn has prepared this information to help you navigate the path ahead.
Table of Contents

What Happens Immediately After a DUI Arrest in SC?
The moments and days following a DUI arrest are critical. The actions you take can have a significant effect on the outcome of your case. Knowing the procedures involved can reduce anxiety and help you protect your rights from the very beginning.
The Traffic Stop and Arrest Process
A DUI case starts with a traffic stop. Police officers cannot pull a driver over without a valid reason. They must have what is called “probable cause” to believe a traffic violation or a crime has occurred. This could be for something as simple as speeding, swerving over a lane line, or driving with a broken taillight.
During the stop, the officer will look for signs of impairment. These signs might include the smell of alcohol, slurred speech, or fumbling for a license and registration. If the officer suspects you are under the influence, they may ask you to step out of the car to perform Field Sobriety Tests (FSTs). In South Carolina, these tests are voluntary. You are not legally required to take them. These tests can be difficult for anyone to pass, even when completely sober. Factors like medical conditions, nerves, or uneven pavement can affect your performance.
If the officer believes they have enough evidence after their observations and any tests you perform, they will place you under arrest. You will then be taken to a police station for booking. This process involves taking your fingerprints, photograph (mugshot), and personal information.
What is South Carolina’s Implied Consent Law?
After an arrest, you will be asked to take a chemical test to measure your Blood Alcohol Content (BAC). This is where a very important law comes into play. South Carolina’s ‘implied consent’ law states that if you are lawfully arrested by an officer who has probable cause to believe you have been driving under the influence, you consent to taking a chemical test (breath, blood, or urine) to determine your Blood Alcohol Content (BAC).
This means that by having a South Carolina driver’s license, you have already agreed to submit to this test if you are lawfully arrested for DUI. Refusing the test has its own set of consequences, including an automatic suspension of your driver’s license. This is a civil penalty from the DMV and is separate from the criminal DUI charge.
The Administrative License Suspension: What is a Temporary Alcohol License?
If you refuse the chemical test or if you take it and your BAC is .15% or higher, the officer will likely take your driver’s license on the spot. This is the start of an administrative license suspension. This is a DMV matter, not a criminal one.
You have a limited time—typically 30 days from the date of your arrest—to challenge this suspension. You can do this by requesting an administrative hearing. Filing this request allows you to obtain a Temporary Alcohol License, which lets you continue to drive legally while your case is pending. This is a critical step to maintain your ability to get to work or school. Missing this deadline can result in you being unable to drive at all. An experienced lawyer can help file this paperwork correctly and on time.
Understanding the DUI Charges in South Carolina
South Carolina has specific laws that define what it means to drive under the influence. Understanding these definitions is key to understanding the charge you face. The state has two main charges related to impaired driving.
What Legally Constitutes a DUI in South Carolina?
The primary charge is Driving Under the Influence (DUI). A person can be convicted of DUI if the state proves they were driving a motor vehicle while “materially and appreciably impaired.” This standard does not require a specific BAC level. The prosecution can use evidence like the officer’s testimony about your driving, your appearance, your performance on FSTs, and any other relevant facts to argue for impairment.
The second charge is Driving with an Unlawful Alcohol Concentration (DUAC). A DUAC charge is based entirely on your BAC. If your BAC is .08% or higher, you can be charged with DUAC, even if your driving did not seem impaired. The only thing the prosecution needs to prove is that you were driving and your BAC was over the legal limit.
What are the Blood Alcohol Content (BAC) Limits in SC?
The legal BAC limit depends on the driver and the type of vehicle. Knowing these limits is important.
- .08% or higher: Standard for drivers 21 years of age and older operating a regular vehicle.
- .04% or higher: For individuals driving a commercial vehicle (like a truck or bus).
- .02% or higher: For drivers under the age of 21. This is part of the state’s “Zero Tolerance” policy for underage drinking and driving.
Are the Penalties Worse for a High BAC?
Yes, the penalties for a DUI or DUAC conviction become more severe as the BAC level increases. The law creates higher tiers of punishment for those with higher BAC readings. For example, a first-offense conviction with a BAC under .10% has lesser penalties than one with a BAC of .10% to .15%. The most serious penalties are for cases involving a BAC of .16% or higher. A skilled attorney from the Law Offices of Geoffry M Dunn can explain how your specific BAC reading could influence your case.

How Can a Lawyer Build a DUI Defense Strategy?
An arrest for DUI does not mean you will be convicted. There are many ways to challenge the evidence presented by the prosecution. A thorough defense attorney will examine every detail of your case, from the traffic stop to the chemical test results. With over 20 years of experience, the team at the Law Offices of Geoffry M Dunn knows how to identify weaknesses in the prosecution’s case.
Challenging the Initial Traffic Stop
The entire case against you rests on the legality of the initial traffic stop. If the officer did not have a valid, legal reason to pull you over, any evidence gathered after the stop could be suppressed. This means it cannot be used against you in court. An attorney will review the police report and any available video evidence to determine if the officer had legitimate probable cause for the stop.
Disputing the Field Sobriety Test (FST) Results
As mentioned, FSTs are notoriously unreliable. A defense lawyer will question the officer’s training and how the tests were administered. Police must follow specific national standards when conducting these tests. Any deviation from these standards can make the results invalid. Also, a lawyer can highlight environmental factors (like wind or poor lighting) or personal medical issues (like back problems or inner ear conditions) that could have made it impossible for you to pass the tests.
Questioning the Breathalyzer or Chemical Test Results
Breathalyzer machines are not perfect. They require regular maintenance and calibration to be accurate. A lawyer can investigate the specific machine used in your case to see its maintenance history. The officer administering the test must also be certified and must follow a strict procedure, including an observation period. Any failure to follow these rules can lead to the test results being thrown out. Certain medical conditions, like acid reflux (GERD), and even some diets can produce a falsely high reading on a breathalyzer.
Breaking the “Chain of Custody” for Blood/Urine Samples
If a blood or urine sample was taken, the prosecution must prove that the sample was handled correctly at every stage. This is called the “chain of custody.” The sample must be properly collected, sealed, labeled, stored, and transported to the lab. Any mistake or gap in this chain can lead to contamination or questions about the sample’s integrity. An attorney will investigate the chain of custody for any potential errors that could help your defense.
DUI Defense: Common Questions
Facing a DUI charge leads to many questions. Here are answers to some of the most common ones.
Should I refuse a breathalyzer test in South Carolina?
This is a complicated decision. If you refuse the test, you will face an automatic license suspension under the implied consent law. On the other hand, refusing means the prosecution has one less piece of evidence to use against you for the criminal charge. There is no single right answer, as it depends on the specifics of your situation. Discussing this with a lawyer immediately after an arrest is the best course of action.
Will I definitely go to jail for a first-offense DUI?
A first-offense DUI conviction does carry the possibility of jail time. But an automatic jail sentence is not a certainty. For many first-time offenders, a capable lawyer can negotiate for alternative sentences. These might include paying fines, completing community service, and attending an alcohol and drug safety program (ADSAP). The strength of your legal defense plays a large role in the final outcome. The Law Offices of Geoffry M Dunn works to achieve the best possible result for every client.
Can a DUI charge be reduced to a lesser offense like reckless driving?
Yes, in some cases, it is possible to negotiate with the prosecutor to have a DUI charge reduced to a lesser charge, such as reckless driving. This is often a major goal in DUI defense. A reduction can help you avoid the stigma and some of the harshest penalties of a DUI conviction, like the mandatory IID and license suspension. Whether a reduction is possible depends on the facts of your case, and having a skilled criminal justice attorney to negotiate on your behalf is vital.
How much does a DUI lawyer cost in South Carolina?
The cost of legal representation varies based on the details of a case. But it is important to think about the value of a strong defense. The total financial impact of a DUI conviction—including fines, court costs, dramatically increased insurance premiums, and potential job loss—can be enormous. Hiring an experienced attorney is an investment in protecting your future. It is often far less expensive than trying to handle the long-term costs of a conviction on your own.

Conclusion
A DUI charge in South Carolina is a serious matter with lasting consequences. However, it is important to remember that an arrest is not a conviction. You have rights, and there are defense strategies that can be pursued. Understanding the process and acting quickly to protect yourself are the most important things you can do.A DUI charge does not have to ruin your life. The most critical step you can take is to speak with an experienced South Carolina DUI defense attorney immediately. For trusted guidance in the Rock Hill, SC area, contact the Law Offices of Geoffry M Dunn today for a free, confidential consultation to discuss your case and learn how we can help defend your rights.