A senior figure in the Neapolitan Camorra, Amato rose to lead one of the clans that emerged from the violent internal wars that periodically reshaped organized crime in the Campania region. His longevity at the top of a structure defined by brutal competition — and the accumulation of multiple street nicknames — reflects both his durability and the degree to which he became embedded in the culture of that underworld.

Wilken's case drew particular attention from forensic investigators for the breadth and nature of his offenses — spanning two distinct victim categories over nearly seven years in Port Elizabeth before his arrest in 1997. His crimes included the killing of his own daughter, motivated by a stated theological rationale, alongside attacks on prostitutes and young boys. Convicted of seven murders, he received seven life sentences, with the presiding judge noting that the death penalty would have applied had it remained in force.

Her method was methodical and sustained: she used personal advertisements to draw men to her Indiana farm, where they disappeared — their money gone, their bodies buried on the property. Over two decades, she operated largely without suspicion, exploiting the trust of people who believed they were responding to a romantic opportunity. The scale of what investigators eventually uncovered placed her among the most prolific killers of her era, and the uncertainty surrounding her own death left questions that were never fully resolved.

Palczynski's case stands out for its duration and the intimate scale of the violence — four killings followed by a near four-day hostage siege involving a family, conducted by a single individual in suburban Baltimore. The standoff became one of the longest of its kind carried out by one person in the region, and its resolution required coordinated law enforcement action before police fatally shot him as he reached for a weapon.