According to Dean, Colson later compiled hundreds of names on a "master list" which changed constantly. On December 20, 1973, the Congressional Joint Committee on Internal Revenue Taxation concluded that people on the "Enemies" list had not been subjected to an unusual number of tax audits. The report revealed a second list of about 576 (with some duplicates) supporters and staffers of George McGovern's 1972 presidential campaign given to Internal Revenue Commissioner Johnnie Walters by John Dean on September 11, 1972.