Wasn't that Hertz reporting rental cars as stolen, because Hertz lost track of them and assumed that the last renter had never returned them?
This would be Hertz selling cars. Even if they later mistakenly reported them as stolen the buyer should not be at risk of jail because the car would be registered to the buyer in the state's records.
If Hertz can't handle a simple rental transaction correctly without calling the police and resulting in a false arrest, I'm certainly not going to trust them to handle a car sale correctly.
The big difference is that with a sale there is paperwork filed with the state showing that the car is yours. If Hertz gets confused and still reports the car stolen that shoukd clear things up with police and prosecutors.
If Hertz botches it so badly that the state paperwork cannot be correctly filed you will find that out shortly after buying the car and can get it corrected.
This would be Hertz selling cars. Even if they later mistakenly reported them as stolen the buyer should not be at risk of jail because the car would be registered to the buyer in the state's records.