Ken Holmes, a 1971 Kimball High School graduate and much sourced expert on Bonnie and Clyde, has died. He was 60. Advocate columnist Gayla Kokel writes this morning that Holmes had been awaiting a liver transplant.

Holmes was a go-to source for media outlets worldwide working stories about West Dallas’s most notorious couple. He owned the Bonnie & Clyde Ambush Museum in Gibsland, La. And he ran a tour guide company, offering tours related to Bonnie and Clyde, the JFK assassination and the Branch Davidian compound in Waco.

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We interviewed Holmes, during a tour of Clyde Barrow’s West Dallas, in 2009.