Probable cause
The main legal issue is usually whether the officer had enough facts to reasonably believe a DUI offense may have been committed. Field sobriety tests can support that belief, but they are only one part of the picture.
Short Answer
In Indiana, an officer may sometimes make a DUI-related arrest based largely on field sobriety test results, but the legality of the arrest usually depends on the totality of the circumstances, not just the tests alone. Field sobriety tests are one piece of evidence that officers often use to decide whether they have probable cause to arrest.
That means the officer does not usually need a chemical test result before making an arrest. In general, an arrest may be based on observed driving behavior, physical signs of impairment, performance on roadside tests, admissions, and other facts that together suggest impairment.
At the same time, field sobriety tests are not perfect. They can be affected by nerves, medical issues, fatigue, weather, road conditions, footwear, lighting, and how the tests were administered. Because of that, a DUI arrest based only on field sobriety tests may be contested depending on the facts.
Indiana law can differ from the rules in other states, and local police practices may also vary. Whether an arrest was lawful is often a fact-specific question that depends on what the officer saw, what tests were given, how they were performed, and whether the officer had enough information to believe impairment was present.
If you were arrested after roadside testing, the field sobriety tests may still matter later in the case. They can be challenged as unreliable, improperly administered, or inconsistent with the rest of the evidence. But the existence of an arrest does not by itself prove the DUI charge will stand.
What This Question Usually Means
People asking this question usually want to know whether an officer can make a DUI arrest before any breath, blood, or urine test is completed. In everyday terms, the question is whether roadside balance and coordination tests are enough for an arrest.
The answer usually turns on probable cause. Probable cause is a legal standard that asks whether the officer had enough facts, taken together, to reasonably believe a DUI offense may have occurred. Field sobriety tests are often used as part of that probable-cause decision.
The question may also be about whether field sobriety tests are mandatory, whether failing them automatically means arrest, or whether an officer must have more evidence than test performance alone. In general, those issues depend on the facts and on Indiana DUI procedure.
General Legal Rule
In general, an officer may arrest for DUI if the officer has probable cause based on the totality of the circumstances. Field sobriety tests are commonly used as evidence supporting probable cause, but they are usually not the only factor officers consider.
Probable cause is not the same as proof beyond a reasonable doubt. An officer does not need to prove the case before making an arrest. Instead, the officer usually needs a reasonable factual basis to believe the person was impaired.
Field sobriety test results may contribute to that basis, especially when combined with erratic driving, odor of alcohol, slurred speech, poor balance, admissions of drinking, or other observations. In general, if the only evidence is field sobriety test performance, the arrest may be more vulnerable to challenge than an arrest supported by multiple signs of impairment.
Key Factors
Other observed signs of impairment
Officers often rely on more than roadside tests. Driving behavior, speech, odor, coordination, demeanor, and statements can all matter when deciding whether to arrest.
How the tests were administered
A test may carry less weight if it was given improperly, under poor conditions, or without clear instructions. Problems with administration can affect how reliable the results are.
Physical or environmental factors
Nerves, injuries, age, weather, uneven ground, lighting, footwear, and medical conditions may affect performance. These factors may help explain poor test results without showing impairment.
Chemical testing
A breath, blood, or urine test may be requested before or after arrest, but an officer usually does not need a chemical test result before making the arrest itself.
Indiana-specific procedure
Indiana rules and local practices matter. A question about arrest legality in Indiana should be evaluated under Indiana law, which may differ from how another state handles DUI stops and arrests.
When to Talk to a Lawyer
If you were arrested in Indiana after field sobriety tests, it is often wise to speak with a lawyer promptly, especially if there was an injury, a medical condition, a poor testing environment, a refusal issue, a chemical test request, or any confusion about what the officer observed. A lawyer can review whether the officer had probable cause, whether the tests were administered properly, and whether any constitutional or procedural issues may matter. This page is general legal information only and is not legal advice.
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Find Indiana LawyersQuestions to Ask an Attorney
- What facts usually count toward probable cause in an Indiana DUI arrest?
- Can field sobriety tests be challenged if they were given on uneven ground or in bad weather?
- Do medical conditions or injuries matter when evaluating test performance?
- How important are dashcam or bodycam recordings in a DUI case?
- What is the difference between arrest legality and whether the charge can be proven later?
- Are there Indiana-specific rules about roadside sobriety testing that I should know about?
- What evidence should I preserve right away after the stop?
- How do chemical test results interact with the field sobriety test evidence?
Documents and Evidence
Police report
It may show the officer’s observations, the stated reasons for the stop, and the facts used to justify the arrest.
Dashcam or bodycam video
Video may show the stop, the testing conditions, the officer’s instructions, and the driver’s actual performance.
Any chemical test result
A breath, blood, or urine test may add important context, even if the arrest happened before the result was known.
Medical records
Records may support an explanation for balance, speech, or coordination issues unrelated to intoxication.
Photos of the scene
Images may help show lighting, slope, weather, traffic, or other conditions that may have affected the field tests.
Witness statements
Passengers or bystanders may have seen how the tests were given and whether instructions were clear.
Personal notes made soon after the stop
Contemporaneous notes may help preserve details that are easy to forget later.
Legal Disclaimer
This page is for general legal information only and is not legal advice. It does not create an attorney-client relationship. Laws and procedures may change and may vary by jurisdiction. You should talk to a qualified attorney licensed in your jurisdiction about your specific situation.
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