I am writing a space opera and one of my characters -- actually a good guy -- goes rogue and mutinies, running off with his ship and those of his crew he trusts. My question is whether he might be court martialled in his absence? I think there is more oomph with a court martial in play

I realise my genre affords me plenty of leeway in what i may write, but, by the same token, I don't want things to come across as too outlandish or preposterous, if it were read by someone who had served in the military. I looked online, but couldn't find anything relating to the question.

Any input gratefully received. .