Seven women vanished. All have been linked to the same Philadelphia home, where police now suspect a deceased man may have been a serial killer.

A forensic psychologist explains why a 1980s evaluation may have missed the warning signs:
https://theconversation.com/im-a-philly-forensic-psychologist-who-has-conducted-dozens-of-psychopathic-evaluations-heres-why-an-evaluation-of-r-c-horsch-in-the-80s-didnt-identify-him-as-a-possible-psychopath-294035