Corwin's place in Texas legal history stems not only from his crimes but from what followed them — his case became the first successful prosecution under the state's serial killer statute, a law designed to allow multiple murders across jurisdictions to be tried as a unified pattern of conduct. The convictions were secured after he confessed to three killings committed over a span of months in 1987, crimes that had crossed county lines and complicated earlier investigative efforts. His execution in 1998 closed a case that had quietly reshaped how Texas prosecutes defendants whose violence spans multiple jurisdictions.

Within the Chicago Outfit's broad criminal apparatus, DeStefano occupied a particular niche as a loan shark whose methods of enforcement were distinguished by their cruelty and unpredictability — qualities that made him useful to the organization and feared among its debtors. His violence was not merely instrumental but appeared to reflect a genuine disposition toward sadism, which set him apart even in an environment where brutality was commonplace.

His pattern was consistent across more than two decades: sexual violence followed by fire, the latter used to destroy evidence of the former. Released on parole in 2004 after serving time for his first killing, Kirkland went on to murder four more victims in the Cincinnati area within three years, two of them teenage girls. A quirk of Ohio parole law — requiring inmates to be evaluated against their conviction rather than the underlying crime — had allowed his release despite a record of chronic disciplinary violations in prison.

Operating across Colombia and Venezuela over the better part of a decade, Sánchez Latorre exploited public spaces and the trust of children to carry out an extensive pattern of abuse that authorities believe claimed more than 500 victims. The scale of documented material recovered from his home — nearly 1,500 files and hundreds of videos — underscores both the systematic nature of his crimes and the degree to which they went uninterrupted. His ability to continue after a 2008 arrest, relocating and assuming a false identity, points to the failures of the systems meant to stop him.