What is the importance of the investigation photos in the book, The Lazarus Project?

Investigation photos relating to the killing of Lazarus appear throughout the novel. The investigation photos – some of which include Police Captain Evans holding up the dead Lazarus – appear at the beginning of several chapters. The photographs also include images of Olga, Shippy’s house, and the sights of Chicago in the early 1900s. These photos provide visual context for the reader relating to the killing of Lazarus, and also help the police to build their case against Lazarus.