If you suspect a DUI incident
https://pr.portlandtribune.com/article/The-Weinstein-Firm-Addresses-Rising-Atlanta-Motorcycle-Fatalities-and-New-Legal-Challenges-Under-Senate-Bill-68?storyId=69fa65b6cdd5c000024f22ba
If you suspect a DUI incident, inform police; their testing and report can be critical for liability and legal outcomes in your case.