Paul Novak's outwardly heroic persona as a post-9/11 paramedic concealed a dark side that culminated in the brutal murder of his estranged wife Catherine in their Sullivan County home

Malcolm Webster's wife, Claire, died in a car crash in a remote part of Scotland, and he was apparently inconsolable. When his second wife, Felicity, almost died in similar circumstances in New Zealand and money is missing, suspicions were raised.

Kathy Augustine was a politician serving in the Nevada Senate. Shortly after her husband of 17 years died from complications of a stroke, she married Chaz Higgs, a critical care nurse whom she met while he was caring for her late husband.