Savage: Manhunter by Sydney J. Bounds
Helen Dexter wanted to know who killed her husband, Harold, and Pinkerton's gave Savage the job. In Calamity, neither Sheriff Ballinger nor his deputy were that interested as they had a gang of robbers to deal with. But then there is a second widow, Mary-Lou, who has a map of a possibly valuable mine. Now Savage must tangle with the Bloody Hills gang, led by Blackie. As a prisoner of the gang, Savage faces Poison Palmer, a killer who is not quite sane. It isn't long before a lynch party is on the cards and in a surprise shoot-out all the mysteries are resolved.