First car to 3 million miles? (this guy taught at my jr. high school)

I still call bs. 189 miles a day, every single day for the past 44 years. Dude would have to live behind the wheel of his volvo. No f'in way. I would guess that the odometer in his volvo only registers up to 99,999 miles right? Who is watching this odometer roll over to verify his claim? Is someone watching this occur besides the owner? Where does he drive? How many times has the engine been replaced or rebuilt? There is no way this pos volvo has racked up that many miles!!! Please prove me wrong! I want to know how they tracked his mileage.