GARDEN CITY, Kan. (AP) -- Original documents from the murders of a southwest Kansas family that became the subject of Truman Capote's "In Cold Blood" are being auctioned off.

Case files about the 1959 murders of the Herb Clutter family in Holcomb are being auctioned by a Seattle-based auction company specializing in film and literature relics.

The files from Kansas Bureau of Investigation Agent Harold Nye include original investigation notebooks and photographs from the Clutter investigation.

The Garden City Telegram reports (http://bit.ly/LCb6WT ) the items include crime scene photographs of the killing that have not been made public.

Vintage Memorabilia President Gary McAvoy says Nye's son gave him the materials a few months ago. He says the files are being auctioned off as a single lot to preserve their historical value.

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Information from: The Garden City Telegram, http://www.gctelegram.com