Killer Instinct with Chris Hansen

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.

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.

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

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, CO to discover the shocking truth behind her murder.

Poker club owner Paul Horn is gunned down in his apartment. He made some deadly enemies and detectives reveal four suspects, all with the opportunity to murder Paul. Chris Hansen investigates which one took the ultimate gamble and pulled the trigger.

After being terrorized and threatened by a friend's partner, Susan Bauer is found murdered in her own home. It appears to be an open and shut case for detectives. Chris Hansen discovers, however, there is much more to this story than first meets the eye.

The body of 20-year-old Sophia Arnold is found on the banks of the Mississippi River. Police interview two men whose stories don't match up. Chris Hansen unfolds the horrific truth... and discovers which one of them murdered Sophia - and why.

The tragic 1999 disappearance investigation of Hannah Hill in Akron, Ohio spans nearly 13 years before her family gets justice. Chris Hansen discovers it was a heart-breaking case of a young woman's trust - betrayed.

The mysterious death of an antiques dealer in Henrico, Virginia leads detectives on a case that would span nearly 20 years. Chris Hansen follows a twisting trail of forensic evidence, potential suspects, and multiple confessions to find the killer.

The body of Daavid Campbell is found tortured, strangled, and floating in a pond in Illinois. Chris Hansen explores three motives for the murder: love, money, and revenge. Soon, they reveal the horrifying and shocking truth.