Saw some photos floating around on facebook. I know nothing about vehicles but the comments made it sound like poor maintenance on the truck. Something about looked like screwed fell out and caused an issue with the axle.

Edit - per someone claiming to be the tow truck driver but they don't specify if the damage is from the accident or the cause of the accident.

"Sheared all the bolts off both axles, no clue how it didn't blow any tires or rims, even hit the front wheel and bent the front leaf springs at the front shackle"