Sennett was found dead in her home March 18, 1988, with eight stab wounds in the chest and one on each side of her neck. Smith was one of two men convicted in the killing. The other, John Forrest Parker, was executed in 2010.
Prosecutors said they were each paid $1,000 to kill Sennett on behalf of her pastor husband, who was deeply in debt and wanted to collect on insurance.