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Revealing how Mary Pearcey began an affair with her victim's husband, how she inserted herself into the family's life and how she lured her rival to her death.

Murder Maps

Mary Pearcey

In 1878, a widow is killed in her own home, and the killer is her own servant; the young servant does not only kill and dismember her employer, she also steals her clothes, her property and her identity.

The Richmond Murder

Cleveland, Ohio became a notorious city in the 1930s, struggling under the Great Depression, crime and corruption even before a serial killer prowled its streets.

Cleveland Torso Murders

Putting on the front of a kindly baby farmer, someone who takes in the children of unwed mothers for a fee, Amelia Dyer became the most prolific killer in British history.

Amelia Dyer: The Baby Farmer

An investigation into Herbert Rowse Armstrong, known to history as "The Hay Poisoner," received a conviction in 1922 of murdering his wife with arsenic.

Herbert Armstrong: Hay Poisoner

Henri Landru targets lonely, vulnerable women left behind by the war and seduces them with promises of marriage; he then lures them to houses outside Paris, where they vanish.

Bluebeard

In 1911, a gun battle on the streets of London, The Siege of Sidney Street, is the first breaking-news story in history.

The Siege of Sidney Street

An examination of the notorious crimes of Jack the Ripper, among the most infamous serial killer in history, who murdered five women in Whitechapel, England.

Jack the Ripper: Part Two

Jack the Ripper: Part One

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S5 E9 | Mary Pearcey