Who is Colonel Walter Sproule from Word of Honor and what is their importance?

Colonel Walter Sproule is the sitting judge of the military trial against Tyson. He's an elderly man, and he is exhausted by the end of the trial. As the start of the trial, he reminds the prosecution that while they should provide the evidence, they are not to get caught up in the need to win the case at all costs, as a fair representation of the facts is more important. Prior to sentencing, he also reminds the panel that they are to consider extenuating circumstances in arriving at a sentence - including Tyson's achievements as a civilian.