What distinguishes Millet's case is less the number of victims than the institutional pattern behind them — each killing followed an early release from prison, making his crimes a sustained indictment of the French penal system's handling of a demonstrably dangerous individual across more than five decades.

McGurn built his reputation within the Chicago Outfit through a combination of personal vendettas and professional violence, becoming one of Capone's most trusted and frequently deployed enforcers during the height of Prohibition-era gang warfare. His career traced an arc from street-level retaliation to high-profile assassinations, placing him at or near some of the period's most consequential criminal events. The same notoriety that made him valuable to Capone ultimately marginalized him within the organization, leaving him to spend his later years on the periphery of a world that had moved on without him.

Joubert's crimes unfolded across two states over roughly sixteen months, targeting young boys in circumstances — a jogging trail, a paper route, a walk near home — that had previously seemed unremarkable. What distinguished the case investigatively was the persistence of physical evidence, including bite marks and binding methods, that eventually connected killings separated by geography and time. He was a member of the U.S. Air Force at the time of the Nebraska murders, stationed at Offutt Air Force Base, a detail that shaped how investigators ultimately identified and closed in on him.

One of the principal architects of Colombia's most powerful paramilitary federation, Castaño helped shape an organization responsible for widespread atrocities against civilians during the country's long internal conflict. His influence extended beyond battlefield command into drug trafficking networks that drew the attention of both Colombian and U.S. prosecutors. Even after formal demobilization, he remained a figure of lethal consequence — accusations linking him to the killing of his own brother, himself a notorious paramilitary chief, suggest the depth of internal violence that characterized the AUC's leadership.

Her cultural legacy — the shoes, the parties, the palatial building projects — has a way of obscuring the underlying mechanism: the systematic looting of a state treasury while millions of Filipinos lived under martial law and economic hardship. Alongside her husband Ferdinand, she oversaw what the Guinness World Records formally recognized as the greatest robbery of a government in history, with an estimated $5 to $10 billion extracted from public funds. The spectacle of her lifestyle was not incidental to her power but arguably integral to it, projecting an image of Philippine prestige abroad while deflecting scrutiny at home.