You used to be able to do this. It will follow you now with all records being electronic now.
They will make you do all the classes, programs, and treatment out of state (assuming after three they are putting him into programs). It would be no different.
The only thing that happens, I may be wrong, is it will be considered a DUI in his new state. But that doesn’t change anything.
This is what I understand on the subject. I may not be 100% correct.