President Abraham Lincoln signed legislation creating the Secret Service on April 14, 1865, the day of his assassination. It was commissioned on July 5, 1865, in Washington, D.C., as the "Secret Service Division" of the Department of the Treasury. After being appointed by President Andrew Johnson, William P. Wood was sworn in as the first chief of the Secret Service on July 5, 1865 by Secretary of the Treasury Hugh McCulloch.