Technoviking said:All I know is that he's been accused of something and he's going before a court martial to decide guilt or innocence.
I feel the need to state the obvious - the finding will be guilty or not guilty. Once you are charged and subject to the judicial process you will not be found "innocent". Innocence can only be claimed by the finding of another person guilty of the same single act or by having the charges dismissed. There are many reasons for a "not guilty" finding which in the case of courts martial is "reasonable doubt."
As for mercy killing, that is whole different story best left to the world of advanced care directives and compassionate medical practitioners and not soldiers on a battlefield. In the end we will all die, what is in question in the "mercy scenarios" is whether it should be decision, a consequence, a natural or un-natural cause.