Check his 1040 returns. See if he claimed depreciation, mileage, tolls, etc
...and paid the self-employed social security taxes.
/sarc
They can get him via the Al Capone violation route
....Abrego Garcia was paid between up to $1,500 per trip and made about one to two smuggling trips per week, according to one co-conspirator, Joseph revealed.....
Oh my Godses
I hope he used an EV to transport his humans
Otherwise, lock.him.up.