When Thai authorities arrested a transient man for a series of brutal homicides across Chiang Mai and Chiang Rai provinces, they uncovered a dark pattern of intra-group violence hidden in plain sight. This episode examines the chilling international phenomenon of serial offenders who target transient, marginalized communities where victims can vanish without a trace. We dissect the unique sociological vulnerabilities of the unhoused population and why international justice systems struggle to detect predators operating in the shadows of major tourist hubs.