A criminal with no brain abnormalitiesWatch this thread
Perhaps look at other causes of crime without a biological explanation, but deterministic (e.g. Sociological positivism) like strain theory (Look at the work of Durkheim/Merton/Agnew). Another suggestion is to look at twin studies which look at the combination of environmental issues and genetic links (Barnes et al, 2014 52(4) Crim. 588)
You could also consider the theories of crime, which focus more on a free will/rationalism explanation. Research things like Routine Activity Theory (Cohen & Felson), Rational Choice Theory (Clarke & Cornish), Neutralisation Techniques (Sykes & Matza), Labelling Theory (Lemert, Tannenbaum).