In the U.S. Supreme Court, the advocate makes his or her best arguments along with the best supporting evidence available. And the advocate can’t do much better than finding both via a sitting justice.

That’s exactly what Lisa Blatt, head of Arnold & Porter’s Supreme Court and appellate practice, found as she wrote her brief in Marx v. General Revenue Corp. She represents General Revenue in a statutory interpretation case asking whether a defendant who prevails in a Fair Debt Collection Practices Act suit may be awarded costs when the plaintiff did not bring suit in bad faith or for the purpose of harassment.