“...almost at his drive time limit”
I don’t understand, how is Walmart responsible?
Walmart has deep pockets. Deeper than the insurance company, which is probably a Walmart subsidiary anyway. That is why they are being sued.
If Walmart owns the truck and employs the driver they can be held liable for the drivers actions. What remains to be seen is what, if any, responsibility rests with the bus driver.
If you hire a driver and they’re driving on duty and your name is on the truck, you’re responsible for everything including the sppedin. The driver may also be held accountable.
Approaching the limit seems like the attorney threw in the kitchen sink. But speeding, write a check and fire the guy. Let the DA have him if they want.