Biosocial criminology—and biosocial criminologists—focuses on both the environmental and biological factors that contribute to antisocial behavior. Importantly, these two domains are not separate parts of an equation but pieces of the same puzzle that fit together for a complete picture of the causes of crime/antisocial behavior. 

Fitting the Facts of Crime applies a biopsychosocial lens to the “13 facts of crime” identified by John Braithwaite in his classic book, Crime, Shame and Reintegration. The authors unpack established facts—about gender and sex, age, environment, education, class, social bonds and associations, stress, and other influences—providing both empirical research and evidence from biopsychosocial criminology to address the etiology behind these facts and exactly how they are related to deviant behavior.

With their approach, the authors show how biopsychosocial criminology can be a unifying framework to enrich our understanding of the most robust and well-established topics in the field. In so doing, they demonstrate how biological and psychological findings can be responsibly combined with social theories to lend new insight into existing inquiries and solutions. Designed to become a standard text for criminology in general, Fitting the Facts of Crime introduces key concepts and applies them to real-world situations.

John Hagedorn, who has long been an expert witness in gang-related court cases, claims that what transpires in the trials of gang members is a far cry from what we would consider justice. In Gangs on Trial, he recounts his decades of experience to show how stereotypes are used against gang members on trial and why that is harmful. Hagedorn uses real-life stories to explain how implicit bias often replaces evidence and how the demonization of gang members undermines fairness. Moreover, a “them and us” mentality leads to snap judgments that ignore the complexity of gang life in America.

Gangs on Trial dispels myths about gangs and recommends tactics for lawyers, mitigation specialists, and expert witnesses as well as offering insights for jurors. Hagedorn describes how minds are subconsciously “primed” when a defendant is identified as a gang member, and discusses the “backfire effect,” which occurs when jurors hear arguments that run counter to their beliefs. He also reveals how attributional errors, prejudice, and racism impact sentences of nonwhite defendants.

Hagedorn argues that dehumanization is the psychological foundation of mass incarceration. Gangs on Trial advocates for practical sentencing reforms and humanizing justice.