I’m not knowledgeable about odometers at all, but if it’s as easy as “hooking up to a computer” to get the real mileage, why don’t people do that when they buy the trucks?
That said - odometer fraud is a big fucking deal here. A vehicle with unknown mileage is worth far less at auction (just the fact that it's unknown is a huge flag) and if the auctioneer was aware of the fraud (as they're implying Holman Fleet Leasing was) then I'm curious to see how this is resolved... a smaller auction house would likely see jail time for several employees.