Milligan operated at the intersection of Atlantic commerce and the slave trade, accumulating influence as both merchant and ship-owner before channeling that wealth and expertise into shaping London's infrastructure. His central role in establishing the West India Docks — securing their statutory monopoly — made him an architect of the trade systems that depended directly on enslaved labor in the Caribbean.

Active over more than two decades in South Los Angeles, Franklin targeted Black women and girls at a time when their disappearances drew little sustained public attention — a fact that shaped both the duration of his crimes and the slow pace of the investigation. The "Sleeper" portion of his nickname refers to an apparent gap in killings during the 1990s, though investigators later concluded he may have continued throughout. His case became a focal point for broader discussions about how law enforcement prioritized — or failed to prioritize — cases involving victims from marginalized communities.

Spillman's crimes stand out for their deliberate brutality and the calculated nature of his targeting — a nine-year-old, a teenager, and her mother, all killed within roughly a year in rural Washington State. He stalked his victims while identifying, in his own account, with a predatory fantasy, and the physical evidence connecting him to the murders was extensive. His guilty plea to three counts of first-degree murder came only under the pressure of a potential death sentence.

Over a concentrated period in spring 1984, Carter killed four women in California, with a fifth death also attributed to him — a cluster of violence that placed him among the cases defining California's response to serial and spree offending in that era. The combination of charges — murder and serial rape — reflects the sustained predatory pattern prosecutors documented across the investigation. He was sentenced to death.