The Red Thumb Mark

"Before Kathy Reichs's Temperance Brennan and Patricia Cornwell's Kay Scarpetta, there was Dr. Thorndyke, the first ever fictional forensic scientist.The only evidence against young Reuben Hornby in a jewel theft is his thumb print smeared in blood. It is enough to convict him of the crime until physician Dr. John Thorndyke dares to ask and answer the question, Can a fingerprint be forged?""