The observations of an off-duty police officer assisted the identification evidence in Mr. Griner's case. The Ontario Court of Appeal upheld his conviction:
Mr. Griner was in a vehicle that was observed being driven in an erratic manner and which was ultimately involved in a collision. Even though an off-duty police officer identified Mr. Griner as the driver and Mr. Griner admitted to another officer that he was the driver, Mr. Griner took the position that he was only a passenger in the vehicle. Mr. Griner was convicted in the Ontario Court of Justice of one count of care and control of a motor vehicle while impaired. R. v. Griner, 2020 ONCA 371