Over a single summer in Will County, Illinois, Johnson carried out a concentrated sequence of killings that included two law enforcement officers among his victims — a detail that shaped both the urgency of the investigation and the community's experience of the violence. The scale attributed to him, up to fourteen murders across what investigators characterized as a weekend pattern, placed the case among the more severe local crime episodes of the early 1980s.

His career traces the internal architecture of the Yamaguchi-gumi across its most expansive decades — a progression through successive leadership structures that placed him among the organization's central decision-makers. Rising from a postwar municipal job to the rank of sō-honbuchō, he spent roughly four decades navigating the shifting hierarchies of Japan's largest organized crime syndicate as it consolidated power nationwide.

A leading figure in one of Rome's most powerful postwar criminal networks, De Pedis operated at the intersection of organized crime, political violence, and Vatican-adjacent intrigue. His organization, the Banda della Magliana, cultivated ties that reached well beyond street-level crime — into Italy's intelligence services, the far right, and, by some accounts, the financial scandals surrounding the Holy See. The unresolved disappearance of teenager Emanuela Orlandi in 1983, and the decades of suspicion connecting it to De Pedis, ensured that his name remained in circulation long after his death.

A Vietnam War veteran who turned the methodical discipline of military training toward mass violence, Delgado moved through three locations over seven hours with deliberate precision — beginning with his own household and ending in a crowded restaurant. The scale of the attack, 29 dead in a single evening, remains without parallel in Colombian history as the work of a single gunman. What distinguishes the case is less the brutality than the planning: the staged fire alarm, the sequencing of targets, the prolonged duration before police intervention.