July 17, 2019
Interviewing the officer who arrested the driver and the driver
The DRE may become involved after an arrest, in which case he or she will gather all the facts of the arrest from the officer involved. The DRE will also talk to or further interrogate the driver.
Examining the driver’s physical condition
There are several physical signs that indicate impairment that should be obvious to someone with the DRE training. The DRE will examine the driver’s eyes, vital signs (blood pressure, pulse and body temperature), pupil size, muscle tone and nasal and oral cavities. The DRE will also check for signs of drug injection.
Testing for divided attention
Two of the standard field sobriety tests include a mental component designed to reveal impairment: the one-leg-stand and the walk-and-turn. The driver must complete a simple physical task while remembering and successfully following the instructions the officer provided.
Submitting chemical sample for analysis
If the initial BAC testing was a breath test, then the driver will also undergo a blood or urine test, possibly both. These results will be analyzed for drugs and alcohol.