September 10, 1897
A 25-year-old London taxi driver named George Smith becomes the first person ever arrested for drunk driving after slamming his cab into a building. Smith later pled guilty and was fined 25 shillings.
The question being if there were no crash would he have still been charged? Some sources say there were no DUI laws at the time, so he wouldn't have been arrested just for drunk driving, but for the crash itself, or maybe for endangerment.
Or it could all be an urban legend repeated by the myriad of DUI lawyer web sites.