Ok, on the chance of getting censored I have to make some statements. First, people like this are the reason bad accidents happen. He had no business towing a vehicle like this. Tires coming apart on the highway is a major cause of accidents. Second, a major brush fire happen out on the west coast causing millions of dollars of damage a few years ago because of this very same thing. To know you have a problem and do nothing about it is unacceptable. Do you see how the towed vehicle swung out into traffic because the tire were sliding. What if that happen to swing out into your families car, unacceptable.
Next, the reason the tire were rotating backwards is because it was in park. The differential is not locked, however the drive shaft is. When one tire gets some traction it will over power the one on the other side and cause it to turn backward. I am sure both tires and wheels were destroyed. Possible the differential was destroyed. Had it not been raining it would have caught fire. No sir, little mistakes like this cause big accidents, unacceptable.