The Monster Killer

The Monster Killer: Murder, Migration, and the Making of Modern China

In the early years of the twenty-first century, a man on a bicycle moved through the farming villages of central China and killed sixty-seven people. Yang Xinhai - China's most prolific serial killer - operated across four provinces for three years while provincial police departments failed to share information, rural communities went unwarned by a state committed to the appearance of stability, and the social conditions that had produced him remained unexamined and unaddressed.

The Monster Killer is not simply a true crime narrative. It is a work of historical reckoning that uses one catastrophic criminal career as a lens through which to examine the transformation of Chinese society at the turn of the millennium: the great internal migration of one hundred and fifty million people, the hukou system that made migrants legal non-persons in their own country, the labor camp apparatus that deepened criminal formation rather than interrupting it, and the institutional failures of a state that suppressed public warnings in the name of stability while sixty-seven families went to sleep unwarned.

Drawing on criminology, sociology, mathematics, and the traditions of literary historical narrative, Cahir Casey asks the question that animates the best historical true crime writing: how does a human being become capable of this? The answer he finds implicates not just one man, but an entire society at its most vulnerable moment of transformation.

Cahir Casey is an Irish scholar and writer whose work sits at the intersection of history, criminology, and narrative nonfiction. Educated in Ireland and Europe, he has spent more than a decade researching the social and institutional conditions that produce criminal violence, with a particular focus on cases that illuminate the failures of states toward their most vulnerable citizens. His true crime writing is distinguished by its refusal of the purely sensational in favour of the rigorously contextual: he approaches criminal cases as a historian first, asking not only what happened but what the happening reveals about the society in which it occurred. The Monster Killer is his most ambitious work to date, combining years of archival research with a deep engagement with Chinese social history, criminological theory, and the literary traditions of narrative nonfiction. He lives in Ireland.