Stephen Stinnette's sentence also includes time for orchestrating a July fire and riot at the Sumter County jail that he used as a diversion to escape for about seven hours.
The Sumter Item reports the 32-year-old man took a deal Wednesday and pleaded guilty to murder, prison escape and other charges.
Prosecutors said Stinnette shot 24-year-old Jerry Johnson eight times in the head in April 2018 after they committed a robbery together in Sumter County. Investigators say Stinnette buried and dug up Johnson's body twice before trying to sink it in Lake Marion.
Information from: The Sumter Item, http://www.theitem.com
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