Thanks for the chance to help. I am an attorney with over 12 years military law
It is not likely he will be arrested or have a criminal record if he does not go to bootcamp. In fact, the possibility is just about zero. While in theory his unit could charge him under state law, in practice this does not happen.
So criminal conviction is not an issue.
HOWEVER, if he does not go to bootcamp? That is not good. Since his national guard unit can (and likely will) use that as a basis to separate him from the national guard for misconduct (for not following the order to go to bootcamp). If this happens he would most likely receive an "other than honorable" discharge
. This is not good. In fact, it is bad...it would show up on his applications for employment as an "other than honorable" (OTH) discharge. It would disqualify him for most state and federal jobs and can make employment with private employers difficult. Particularly if the person doing the hiring has military background.
So he can refuse to show up, they will discharge him. He will not be convicted of any crime or spend time in jail...but he will also likely receive an OTH discharge.
I must get 10 calls a week requesting assistance from folks who received an OTH discharge in the past and are willing to pay any amount to change that. In the vast majority of the cases, I can not take the case...since for most cases you can not upgrade the discharge.