A bitter showdown is brewing between two prominent Miami lawyers over several million dollars in Cuban funds frozen in U.S. bank accounts.

Roberto Martinez of Colson Hicks Eidson in Coral Gables, Fla., is fighting for the money on behalf of his client, Jeannette Hausler, a former University of Miami law school dean whose brother was executed by a Cuban firing squad in 1960. Hausler and her family were awarded $400 million by a Miami state court judge in January.