In this project I study embodied performances of forensic expertise in England 1920-2000. The project asks what role the expert’s body played in the enactment of forensic expertise in England 1920-2000’ My research derives from the idea that forensic expertise is not only concerned with the creation of a body of knowledge, in the metaphorical sense, or the production of knowledge on bodies (of victims and perpetrators) and the traces they leave. More than this, forensic expertise is a bodily exercise, experience and performance. That is the case because forensic scientists and doctors use their own bodies, through sensory and emotional experiences, in their knowledge-making practices. Also, they enact expertise through the embodied performance of their scientific and/or medical persona. They dress, gesture, look and position their bodies in ways that meet their and their audiences’ expectations of what an expert does and is. In this thesis, I want to trace the development of these ideas by analyzing the embodied performances of experts in their examination practices and in their performances before a lay audience, in the courtroom and in the media.