How did Bo Dukes become part of the Tara Grinstead case?

Army recruit John McCullough told the GBI in 2016 that Bo Dukes had told him in 2006 that a friend killed Grinstead and that Dukes helped dispose of her body. Dukes denied it then, and his DNA did not match the glove. After his girlfriend Brooke Sheridan reported a similar account, Dukes told agents in February 2017 that Ryan Duke killed Grinstead and that he helped hide her remains in a pecan orchard owned by his family.

• McCullough says he first called the local police in 2006, who told Dateline they have no record of it.
• A jury convicted Dukes in 2019 in under an hour on charges including making false statements and concealing a death.
• Dukes is serving a combined 25-year sentence that includes later rape cases and could stay in prison until 2044.

Source: our own transcription of the episode. The full conversation is on Dateline NBC (2026-11-03). Read the whole episode summary →

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