The founder of the Order of the Solar Temple spent decades moving through the margins of esoteric movements before building the organization that would end in mass death. Di Mambro combined a long history of fraud and manipulation with genuine fluency in occult traditions, giving him both the tools and the credibility to attract followers willing to subordinate their lives — and deaths — to his authority. The October 1994 mass murder-suicides that killed him along with dozens of members across Switzerland and Quebec remain among the most studied episodes of destructive cult violence in modern history.

Sowell's crimes came to light only after the discovery of eleven victims at his Cleveland home — a case that also prompted scrutiny of how law enforcement had responded to earlier complaints and missing persons reports connected to his address. The women he killed were largely from vulnerable communities, a pattern that investigators and advocates noted had contributed to the delayed recognition of a pattern.