no
no...federal grant money is for a proven need.
Can I get a Twic card owing back child support
yes
You can attach the estates of him and his parents
Yes. The passport can be revoked or limited, if you owe a certain amount of unpaid child support.
Owing excess child support does not invalidate a passport. That doesn't mean you can't be prevented from the leaving the country.
yes Simply owing a debt is not a crime. Or, it's not suppose to be.
Contact state dept. see link
Passports can be suspended/denied if the amount of arrears exceeds the appropriate threshold, regardless of the child's current age.
The State may do so after notice to the obligor, yes.
Only when owing more than $5000
It depends on the state. In most states, drivers license and vehicle registration privileges can be suspended or revoked if you owe back child support.