Did we ignore all the potential warning signs? Perhaps. But, as a cold-case homicide detective and a Christian, I've discovered another very real explanation. Most of the murder suspects I investigate are seemingly "regular" people who lived uneventful lives following their crime.
They are doting parents (and grandparents), firemen, church elders, engineers, painters, professionals and blue-collar workers. They're your neighbor, your kid's scout leader, your co-worker and your family member. These people aren't serial killers, they're ordinary people who committed a single, extraordinary crime.