Who is Vincent Corva from Word of Honor and what is their importance?

Vincent Corva is a former military leader, who also served in Vietnam. He is a military attorney, whose record shows that he tends to take the hopeless cases. In the case against Tyson, Corva is seldom seen as working on the defense. As the trial is about to begin, however, Tyson visits a house on the base that was set aside for Corva's use, where he finds papers scattered everywhere and taped to the walls, indicating Corva's commitment to Tyson's case.