In January 1965 DePauw incorporated an organization called the "Catholic Traditionalist Movement" in New York State, purportedly with the support of Cardinal Francis Spellman, Archbishop of New York. Shehan demanded that DePauw break with the organization. In summer 1965 Shehan removed DePauw from teaching duties at Mount Saint Mary's Seminary and transferred him to a parish in a Baltimore suburb. Shortly thereafter DePauw left for Rome. On 15 November 1965 Luigi Faveri, Bishop of Tivoli in Italy, signed a document transferring DePauw's incardination from the Archdiocese of Baltimore to the Diocese of Tivoli. Faveri said that he had taken this step at the request of Cardinal Spellman and of the Cardinal Secretary of the Holy Office, Alfredo Ottaviani. This transfer would have allowed DePauw to continue his work with the Catholic Traditionalist Movement in New York. In January 1966 after the attempted transfer from Baltimore to Tivoli became public, Cardinal Shehan said that the transfer was never legally completed and that DePauw was still a priest incardinated in the Archdiocese of Baltimore. In order to excardinate and incardinate, a priest must request excardination of his bishop, and it must be granted. As Cardinal Shehan was following the universal law of the Church, the Bishop of Tivoli supported Cardinal Shehan. Shehan suspended DePauw from his priestly functions. Bishop Blais Kurz, the exiled Prefect Apostolic of Yungchow in China, supported DePauw. On 23 June 1968 DePauw established the Ave Maria Chapel in Westbury, Long Island, where he ministered until his death. He became well known among traditionalist Catholics for his Sunday radio Mass, his video and audio cassettes, and pamphlets. He edited two magazines: "Sounds of Truth and Tradition" and "Quote .. Unquote". His two best-known works are the "Traditional Roman Catholic Mass" and "The Challenge of Peace through Strength", a critique of the American Catholic bishops' pastoral letter on war and peace, "The Challenge of Peace". DePauw died on 6 May 2005.