Killer Instinct With Chris Hansen

Lesbian lovers stab their grandparents to death over their relationship.

After a murder, clues lead police to a doctor who kills rather than cures.

Dectectives discover a tale of obsession when a mom and daughter disappear.

When a woman is killed, police expose a crime ring led by a killer.

A headless body launches an investigation in Michigan.

Chris interviews a man convicted of murdering an elderly Texas woman.

A woman kills her rival in a love triangle and then her husband.

A friendship is changed forever after a man's wife and son die in a fall.

A man kills two women and a boy in Ohio before kidnapping a young girl.