Delta Police are now tasked with looking into the officer's actions under the provincial Police Act, at the request of the Vancouver Police Department.
The investigation stems from a Nov. 6 driving complaint in Ladner that resulted in police making a traffic stop.
Ass. Sgt. Sarah Swallow says the driver failed a roadside screening test, and was issued a 90-day immediate roadside prohibition and had his car impounded for 30 days.
She says that during the incident Delta Police were made aware the driver was a police officer with the Vancouver Police Department.
The Office of the Police Complaint Commissioner has also been notified.