Irey began a 40-year career in public service in 1909 as a clerk for the Chief Postal Inspector. He soon became a
Postal Inspector himself, and served in that role until 1919, when he was appointed Chief of the Treasury Department's Internal Revenue Service Intelligence Unit. On July 1, 1919, the
Commissioner of Internal Revenue,
Daniel C. Roper created the Intelligence Unit to investigate widespread allegations of tax fraud. To establish the Intelligence Unit, six United States Post Office Inspectors were transferred to the Bureau of Internal Revenue to become the first special agents in charge of the organization that would one day become Criminal Investigation. Among the first six, Elmer Lincoln Irey was designated as the Chief of the new unit. Hugh McQuillan, Arthur A. Nichols, Frank Frayser, Everett Partridge and Herbert E. Lucas were the other five that made up the new unit. On October 6, 1919, Irey brought in William H. Woolf from the Office of the Chief Postal Inspector in Washington as his Assistant Chief. They formed the nucleus that became the Intelligence Unit. In that role, Irey formed one of the most successful investigative teams in the history of American law enforcement with agent
Frank J. Wilson leading the hundred-man unit of "T-men" in a three-year investigation against Capone's criminal organization the "
Chicago Outfit". Despite attempted jury tampering and death threats against Wilson, Irey's investigation succeeded in the conviction of Capone for tax evasion in 1931. During the
Lindbergh kidnapping, some sources indicate that Irey insisted on tracking the serial numbers on the gold certificates used as ransom money (which ultimately led to the arrest and conviction of
Bruno Richard Hauptmann). Other sources credit
James W. Wilson. Irey's "T-men" unit prosecuted over 15,000 people for tax evasion (with a 90% conviction rate), including Louisiana Gov.
Huey Long and Chicago businessman
Moses Annenberg, over the course of 27 years. Named chief coordinator of all the Treasury Department's law enforcement agencies in 1937, Irey oversaw the operations of the
U.S. Secret Service, the
IRS Intelligence Unit,
U.S. Customs, the
Bureau of Narcotics, the Alcohol Tax Unit (predecessor to
ATF), and the
U.S. Coast Guard, until his retirement in 1941. == Autobiography ==