Questão jurídica principal
Whether the defendant was not fit to drive after consuming cannabis and alcohol.
Decisão extraída
Yes. The court upheld the finding that he was impaired and not fit to drive.
Fundamentação extraída
There is no fixed scientific threshold for cannabis impairment; fitness must be proven from concrete outward behavior. Here, police observations, medical findings, and forensic toxicology showed diminished performance, and mixed use of cannabis and alcohol increased the likelihood of impairment.