What distinguished Weber's case was not only the number of victims but the repeated failure of medical and legal institutions to act on visible evidence — bruised throats dismissed as convulsions, acquittals secured despite consistent patterns, and a hospital position obtained precisely because authorities had twice cleared her name. She operated across nearly three years and multiple locations before being caught in the act, and even then the legal system defaulted to an insanity ruling rather than a criminal conviction. The case became a notable example of how assumptions about maternal innocence could override physical evidence in early twentieth-century French courts.

Evans operated for years in upstate New York as both a career thief and a killer, moving between worlds of petty crime and violence with enough skill to repeatedly evade and escape law enforcement. His targets were often associates from within his own criminal circles, making his crimes difficult to detect and his body count slow to emerge. The combination of confessed murders, daring escapes, and an almost theatrical final evasion kept him in regional headlines long after most criminals of his profile would have faded from public attention.

The crimes attributed to him span two years and two victims, one of them an unborn child — a detail that shaped how investigators and the public came to understand the case. The designation "February 9 Killer" reflects the investigative framework built around his pattern, connecting murders that might otherwise have remained isolated.

A long-tenured figure in one of New York's most powerful organized crime families, Marino accumulated a record spanning decades — from an assault on a federal agent in 1963 to conspiracy charges tied to the murder of a potential grand jury witness in 1993. His alleged involvement in a plot against his own boss, John Gotti, points to the internal volatility that characterized the Gambino family during that era. He eventually rose to a seat on the family's leadership panel, a position reflecting decades of operational survival within a world of considerable institutional violence.

Her career as a concentration camp guard spanned Ravensbrück, Auschwitz-Birkenau, and Bergen-Belsen, where she was implicated in the systematic torture and murder of Jewish prisoners. What distinguished her case historically was not only the nature of the crimes but the trajectory: she rose through the SS guard system while still a teenager and was tried, convicted, and executed before she turned 23. The Belsen trial placed her conduct on formal legal record, and her sentence — carried out in December 1945 — made her the youngest woman executed under British law in the twentieth century.

As head of the SS, he built a sprawling apparatus of terror that encompassed the Gestapo, the concentration camp system, and the Einsatzgruppen, making him the principal architect of the Holocaust. His organizational capacity — transforming a 290-man unit into one of the Third Reich's most dominant institutions — gave industrial scale to ideologically driven mass murder. Few figures in the Nazi hierarchy held such direct, sustained command over the mechanisms of genocide.