03/18/2010 05:12 am ET | Updated May 25, 2011

Scott Lee Kimball, Alleged Serial Killer, Expected To Plead Guilty; One Victim Still Missing

Scott Lee Kimball was charged Tuesday in Boulder County with two counts of second-degree murder in the deaths of four people missing since 2003.

Kimball, 43, is expected to plead guilty during his arraignment Thursday afternoon in Boulder County District Court, according to a source with knowledge of the case.

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