Handwriting Analysis Page: John Wayne Gacy - Expert analysis of Gacy's handwriting. Includes a scanned handwriting sample. - http://www.handwriting.org/archives/98jan_01.html
Crime Library: John Wayne Gacy - Gacy's life and crimes in 7 chapters. With pictures and a bibliography. - http://www.crimelibrary.com/serial/gacy/gacymain.htm