1. Can you get a marijuana DUI in Indiana if you smoked weed weeks ago?
Yes. Indiana drivers can face marijuana DUI charges even when they consumed cannabis days or weeks before driving. Under Indiana Code § 9-30-5-1, operating a vehicle with certain controlled substances or their metabolites in your blood can be a criminal offense.
This means you don’t necessarily have to be high when police stop you. A blood test detecting a prohibited marijuana metabolite could support criminal charges, even if the intoxicating effects have disappeared. A positive result does not automatically guarantee a conviction, however, and statutory defenses may apply.
2. Can inactive THC metabolites cause a DUI charge in Indiana?
Yes. Indiana’s controlled-substance driving law includes certain drug metabolites, even when those metabolites are no longer psychoactive.
THC is the chemical in marijuana responsible for producing a high. When your body processes THC, it produces metabolites, including THC-COOH, also called THC carboxy. This metabolite does not produce intoxication, but it can remain detectable after marijuana’s effects disappear.
Unlike alcohol, Indiana does not establish a specific numerical THC concentration threshold for this offense. The presence of a prohibited substance or metabolite may be enough to support prosecution, subject to the law’s requirements and defenses.
3. What happens if you test positive for marijuana after a serious car accident in Indiana?
A positive marijuana blood test following a serious Indiana car accident can lead to a criminal investigation and potentially felony charges.
Under Indiana Code Chapter 9-30-7, special chemical-testing procedures apply to certain accidents involving serious bodily injury or death.
Imagine legally consuming marijuana during a Colorado vacation and returning to Indiana. Weeks later, you’re involved in a collision that seriously injures another person.
If blood testing reveals a prohibited marijuana substance or metabolite, prosecutors may investigate criminal charges. However, a positive test alone does not automatically establish responsibility for the accident or satisfy every element of a felony offense.
4. Should you refuse a blood test during an Indiana marijuana DUI investigation?
Generally, refusing a lawfully requested certified chemical test can make an Indiana DUI case more complicated.
Indiana’s implied consent law, found in Indiana Code § 9-30-6-1, subjects drivers to chemical-testing requirements when operating vehicles in the state.
A qualifying refusal can result in:
- A one-year driver’s license suspension for drivers without a qualifying prior DUI / OVWI conviction.
- A two-year suspension for drivers with a qualifying prior DUI OVWI conviction.
Refusing also doesn’t necessarily prevent police from obtaining blood evidence. Officers may seek a search warrant authorizing a blood draw.
5. Can you fight a marijuana DUI charge in Indiana if you weren’t actually impaired?
Yes. An Indiana marijuana DUI charge can be challenged even when blood testing identifies a controlled substance or metabolite.
The prosecution must prove the elements of the charged offense beyond a reasonable doubt. A defense attorney may examine whether the traffic stop was lawful, whether chemical testing followed proper procedures, and whether the laboratory results are reliable.
The distinction between an impairment-based DUI / OVWI charge and a controlled-substance offense is especially important. Proof of actual impairment is not necessarily required for the latter.
Every case depends on its particular facts, and a positive blood test does not eliminate your right to challenge the prosecution’s evidence.
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