Nothing's Certain but Death — M.K. Wren

In 1940, Leland Langtry ran off with his redheaded secretary and $10,000 in company funds—or so everyone believed.

Forty years later, Langtry''s remains are found in a boarded-up silver mine tunnel. And as the knife still jammed between his ribs had belonged to his partner in Lang-Star Mining, Tom Starbuck—also long since dead—a jury decided that Tom had killed Langtry.

But Tom''s widow, Delia, resists the verdict and persuades that very private investigator Conan Flagg to find the real murderer—an impossible job made tougher by the curious reticence of nearly everyone in town whenever Leland Langtry is mentioned....