As far as the promotions go, under current regs if he's in a POW status he will be promoted along with his peers. That's nothing new.
However, if the 15-6 investigation shows some wrongdoing on his part, stand by for the hammer to come down on him, HARD. His daddy also needs to shut his piehole if he wants to have any chance of keeping his little boy out of Leavenworth. Damming statements, indeed.