User blog comment:Thailog/Ep. 203 "Alienated" discussion/@comment-1770843-20120513125744/@comment-1038387-20120513140411

In the comics, he's from Terminus. The "experience" with tribunal law is likely a reference to his defense of Earth before the Cooperative court. It happened in between issues 20-30 of his title (too lazy to look up exact numbers). Mostly reprinted in "Mothership Connection", though that trade paperback omits the outcome of the trial.

Plus, he's a lawyer in his civilian identity.