Miller spent decades building and leading white supremacist organizations before his ideology culminated in lethal violence — the 2014 shooting at the Overland Park Jewish Community Center, which killed three people. His trajectory from Klan leadership to domestic terrorism illustrated how extremist networks can sustain and radicalize individuals over long periods. He was convicted and sentenced to death.

Nilsen operated for five years before his arrest came not through detective work but through a plumber's discovery of human remains blocking a drain — a detail that encapsulates how thoroughly his crimes went undetected. His victims were largely young, transient men whose disappearances drew little immediate attention, a vulnerability he appears to have understood and exploited. The ritualistic behavior that followed each killing, documented in unusual detail through his own later writings and interviews, has made him a significant subject in criminological study of organized offenders.