After a DUI arrest, police administer a breath test. (It's significant that, in Oregon, a breath test is not administered before a DUI arrest.)
If the result of the breath test is below the presumptive limit of .08 percent breath alcohol, police are trained to interpret this information to mean that the level of alcohol is "inconsistent with the level of impairment observed." Their training also has them call in another police officer, known as a "drug recognition evaluator," or DRE. (Occasionally, an officer prefers to be called a drug recognition "expert.")
These police officers are not medically trained or certified. They are police officers who have received special police training in gathering evidence in a DUI case.
A DRE will take a driver who has been arrested for DUI through a long examination referred to as a "12-Step" protocol.
If a police suspect a driver has used marijuana (which frequently happens, because drivers who have used marijuana generally admit it), the DRE will administer a series of tests. These are supposed to prove that the person who admitted to using cannabis is somehow impaired by it.
At the end of the DRE testing, the police officer asks for a urine sample, which is sent to the Oregon State Police crime lab for analysis.
What to Do After a DUI Arrest
The Judge Will Order You to Report to the Jail
Diversion Isn't Always Your Best Choice
More About Diversion
What If You Didn't Do Anything Wrong?
Cannabis and DUI
Dismissals, Pleas and Jury Trials
DUI Cases Not Limited to 'Drunk Driving'
Additional Charges Follow When a DUI Results in Death
Cannabis Levels and Driving
Suspension May Follow DUI
One DUI Arrest Changes Everything
You May Save Your License
Police Seek to Prove Impairment from Cannabis
Fines and Fees Follow Convictions
A Breath Test Is Not the Last Word
Marijuana and DUI
DUI Can Affect Jobs and Careers
DUI Attorneys Review Professional Licensing Rules
Felonies and Misdemeanors Carry Jail Terms
Do Not Enter a Guilty Plea at Your First Court Appearance
Mugshot Website Operators Busted
It's a Mistake to Plead Guilty at Your First Court Apearance
Home Detention Updated
It's Normal to Not Know What to Do
DUI Can Lead to Loss of License
DMV Implied Consent Suspension
DUI Conviction May Mean Jail
Drinking Boaters Drowning in a Deluge of Laws