Steinberg uses a number of case studies to emphasise this fact. In one chapter, Trace: On Genes and Crime, Steinberg investigates the search for a “criminal gene”. Steinberg examines the research that lead to the production of The Genetics of Criminal and Anti-Social Behaviour in the 1990s, a major symposium bringing together research on genetic criminology. The purpose of the symposium was simple: to investigate whether genes can influence our likelihood of engaging in criminal or anti-social behaviour. Researchers believed they found a positive correlation, one researcher stating that “genes are likely to influence the occurrence of criminal behaviour in a probabilistic manner by contributing to individual dispositions that make a given individual more or less likely to behave in a criminal manner”.