Chris Hansen back with "Killer Instinct"

Norma Holland talks to journalist Chris Hansen about new season of "Killer Instinct."

Journalist Chris Hansen - known for investigative work catching predators on "Dateline NBC" - is now exploring some of America's most unnerving homicides in "Killer Instinct" on Investigation Discovery.

Good Day Rochester's Norma Holland talked with Hansen about Season 3, which explores cases dating back to the 90s - including the shotgun slaying of Stephen Perret in Citronelle, Alabama, which has all the hallmarks of a mob hit; the death of a wealthy and schizophrenic scientist in Kentucky; the murder of Susannah Chase outside her home in Boulder, CO, a few days before Christmas; and the shooting of a poker club owner in Ohio.

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