After two of John Smith's wives were found to have gone missing, Janice Hartman and Betty “Fran” Gladden Smith, family members took on a decades-long quest for justice.
New breakthroughs in genetic genealogy, combined with investigative work, finally revealed who was behind the Toronto murders of Erin Gilmour and Susan Tice.
It initially seemed that Joy Hibbs died in a house fire, but an autopsy revealed she was killed before the home was set ablaze. Still, decades passed before an arrest came.
“Viewers will see jealousy at its worst, probably unwarranted, certainly corrosive, and in the end, deadly,” Dateline correspondent Keith Morrison said of new details in the shocking crime.