Killer Instinct · Season 3

S3 · E1 · 05/09/2017 · 1 h 00 min

Deadly Compulsive

In Longmont, CO, Tammy Tatum is brutally murdered right near her one-year-old daughter, Sadie. Now 24, Sadie reveals to Chris Hansen the shocking truth... that the killer was someone she knew her entire life.

S3 · E2 · 12/09/2017 · 1 h 00 min

Slip of the Tongue

The brutal shooting of Stephen Perret looks like a mob hit. Police have little evidence, but soon discover Stephen made a call just before he was murdered. Chris tracks down the person Stephen called... who reveals the identity of his killer.

S3 · E3 · 19/09/2017

The Death of a Genius

Detectives searching for wealthy scientist Walter Sartory believe he's been kidnapped and is being held hostage for his fortunes. Chris Hansen discovers that investigators were in a race against time to find Walter before it was too late.

S3 · E4 · 26/09/2017

Murder in Boulder

College senior Susannah Chase had everything to live for, but just a few days before Christmas she was brutally attacked only yards from her home. Chris Hansen travels to Boulder, Colo., to discover the shocking truth behind her murder.