Archive of 18 typed letters by infamous serial killer John Wayne Gacy, with other related material. Most are signed John or J.W. Mainly correspondence with writer Richard Vachula, who published a 1989 article speculating the Gacy was also responsible for the killing of three young boys in Chicago in 1955 when Gacy was only 13, a charge Gacy denied. Most letters are more than one page and supply Vachula with information about Gacy's past.

The archive comprises:

• A photocopy of Vachula's story, which appeared in the July 1989 issue of Chicago magazine.
• 11 letters from John Wayne Gacy to Vachula from February-May 1989, including one letter with Gacy's prescription label attached, showing he uses a nitro patch; plus a one page notarized letter giving Vachula permission to look into the disposition of Gacy's truck. A few of the letters have highlights and pencil underlining.
• Two copies of a press release issued by Gacy after Vachula's story appeared, calling it sleazy and a fraud and claiming Gacy was blackmailed into answering Vachula's correspondence.
• Various flyers and other Gacy related information that Gacy often sent along with his letters, including his bio sheet, a flyer for "They Call Him Mr. Gacy," a copy of his daily menu, photocopies of newspaper articles, a price sheet for Gacy paintings of clown heads, etc.
• Assorted other material, including envelopes from Gacy, an envelope from Chicago detective John Sarnowski to Vachula, a letter from an NBC affiliate congratulating Vachula on his story, a check stup to an unknown for $625 referencing John Gacy, a battery warranty for Vachula, a Chicago Public Schools brochure, etc.
• Two letters to a Virginia Beach man, in one of which Gacy talks about his sexuality
• A John Wayne Gacy True Crime Trading Card from Eclipse entertainment, signed by Gacy.