Killer Thriller: Lindsay Clancy: Monster or Mentally Ill. Can She Be Both?

She killed her three children. But was Lindsay Clancy capable of understanding that what she was doing was wrong?

Elisa Donovan and Jennifer Fessler take on the case and find themselves struggling with the same question that has divided so many people: How much should severe mental illness change the way we judge an unthinkable crime? See for privacy information.