Short of getting a lawyer, he most likely needs to fly back to MA and go to the DMV in person to get a MA DL.
A friend of mine from MA bought a Toyota Tacoma recently and needs license plates for it. The dealer issued him a 30 day temp tag. That expired and Missouri no longer offers a way to extend a temporary tag. Not wanting to become a Missouri resident, his only choice was to fly back to MA, register the vehicle in person, and get MA license plates for it. Then fly back here to Missouri.
Picture your worst nightmare of a DMV, with long lines and disgruntled employees, that's the DMV in Boston, MA.
Attached FileMy local DMV here in Missouri has 6 chairs and 2 nice friendly ladies working the desk. I was just in there a week ago renewing my license plates after being "informed" by a Missouri Highway Patrolman that they were expired (no ticket). I had 2 people in front of me and was in and out of there in about 45 minutes.,