The National Highway Traffic Safety Administration conservatively estimates that 100,000 police-reported crashes are the direct result of driver fatigue each year. This results in an estimated 1,550 deaths and 71,000 injuries. We first of all hope that your son was not part of these statistics and escaped the accident without injury.

As for damages to your vehicle, typically a car receives coverage provided by the owner's car insurance when it is involved in an accident, regardless of who is driving. In many cases when you let someone borrow your vehicle they are covered under your policy unless there are specific exclusions in your policy.

If your policy had exclusion for your son or there is other policy exclusions that exist on your policy that would disallow coverage on him, then the accident may not be covered.

There is also the matter of your son being a household member. If your son was residing with you at the time of the accident and you had not notified your insurance company then they may have issues with him not being added to the policy as a household member and driver of the vehicle. Due to this they might have a reason to deny the claim.

Insurance company guidelines, as well as terms of policies, differ so to find out for certain if your son's accident that occurred in your vehicle when he fell asleep driving will be covered you will need to contact your insurance provider.