AROL M. LIAO’s teeth were knocked out in the accident. One leg is now bolstered by a surgically implanted steel rod. A metal plate likewise shapes her face.

None of that stopped her and a squad of Shearman & Sterling lawyers and summer associates – among them several Russian-speakers – from gaining freedom in the United States for a young political dissident whose escape from Moldova, an obscure and recently re-Stalinized republic of Eastern Europe, seems like something from a Robert Ludlum novel.