I was on a ride-along a couple years back when the officer I was with got a call to respond to an attendant at a gas station. Two folks were acting "oddly" after getting off I-5 to get gas and stretch. We got there, the two occupants of the car were in the bathroom...the officer looked at the car (the drivers door was wide open) and noticed the odometer showed 145,000, on a car that wasn't even two years old at the time. The guys came out of the can and said they were just yelling at each other in the gas station as they had "gotten lost and blamed each other". There was nothing to detain them for (as no crimes had been observed), so they left. I got a call from my friend (the officer) a couple days later. Those guys had gotten stopped on their way back south while passing through Eugene again. No drugs in the car...but $50K in cash and they were both high as kites. 

Brain trusts both of 'em.