He was president of the New York State Prison Commission, and a member of the New York State Board of Parole which in 1904 denied number racketeer Albert J. Adams's application for parole.
Jaeckel war Präsident der New York State Prison Commission und Mitglied der New York State Board of Parole, welche 1904 die Bewährung des mehrfachen Racketeers Albert J. Adams ablehnte.