Doctor Marcus Quigley, qualified dental surgeon, gambler and sometime bounty hunter has gradually been working his way west. His reasons for choosing such a lifestyle are personal and pressing, as well as expedient, for there is someone he means to track down and hold to account for a murder committed some years previously.In GUILTY AS SINNED Doc Marcus Quigley treats a female patient in the town of Sage Fork and learns that she has good reason to want revenge upon the person who beat her and loosened a tooth. When a murder is committed soon afterwards he is convinced that a miscarriage of justice is about to take place and he must move fast to uncover the murderer before someone else is killed. By taking a hand he places himself in extreme danger. In this second adventure from his casebook, we learn more about Marcus Quigley and his long quest to bring a cold-blooded killer to justice.