What gives a police officer probable cause to investigate a DUI?
Answer:
Officers don’t actually need probable cause to begin investigating a DUI — only “reasonable suspicion,” sometimes called reasonable articulable suspicion. Often, all it takes is the officer believing they smell alcohol after pulling you over. Whether that’s proper or not, it’s effectively enough to trigger a DUI investigation. If this happened to you, give us a call and we can help.
Reasonable Suspicion vs. Probable Cause: Two Different Standards
These two terms get used interchangeably in everyday conversation, but they mean very different things in a DUI case. Reasonable suspicion is the lower bar — enough to justify briefly investigating further. Probable cause is the higher bar required to actually arrest someone. An officer can lawfully start asking DUI-related questions on reasonable suspicion alone, well before they have enough to put you in handcuffs.
What Officers Look For to Build Reasonable Suspicion
In practice, the smell of alcohol is often all it takes to shift a routine traffic stop into a DUI investigation. Once an officer believes they detect that odor, they have a basis to start asking about drinking, requesting field sobriety tests, and looking more closely for other signs of impairment. It’s a subjective call at this stage, made by the same person who is also building the case.
But Odor Alone May Not Be Enough for an Arrest
Reasonable suspicion to investigate is not the same as probable cause to arrest, and Georgia courts have drawn that line before. In Clay v. State, 193 Ga. App. 377 (1989), the court held that the odor of alcohol on someone’s breath, without other evidence of intoxication such as erratic driving or slurred speech, is not enough on its own to establish probable cause. An officer needs more than a smell to make an arrest — even if that smell was enough to start looking.
How Officers Build Toward Probable Cause
Georgia courts have found probable cause to arrest even without field sobriety test results, so long as there’s a combination of other factors. In Frederick v. State, 270 Ga. App. 397 (2004), an officer’s testimony that the driver smelled of alcohol, admitted to drinking, and had glassy eyes was enough on its own. Similarly, in Cann-Hanson v. State, 223 Ga. App. 690 (1996), bloodshot, watery eyes combined with the odor of alcohol were sufficient, even with no field sobriety tests administered at all. It’s the combination of factors that matters, not any single one.
Why the Traffic Violation Itself Still Matters
Courts also look at the totality of the stop, not just the moment of arrest. In Temples v. State, 228 Ga. App. 228 (1997), an officer stopped a car for a seatbelt violation, with no erratic driving at all, then detected an odor of alcohol, observed bloodshot eyes, and administered a positive alco-sensor test. The court found that, under the totality of the circumstances, probable cause existed — even though the original reason for the stop had nothing to do with impaired driving.
What to Do Next
If this happened to you, give us a call and we can help.
