The crimes of Henri Landru who, during the First World War, seduced women with promises of marriage and lured them to houses outside Paris where they vanished.
Herbert Rowse Armstrong, was convicted of poisoning his wife with arsenic, even though much of the evidence was circumstantial and the scientific testimony remains disputed.
The unsolved murders committed by the Butcher of Kingsbury Run, a serial killer operating in Cleveland, Ohio, in the 1930s, who murdered at least 12 men and women.
A crime from 1879 in which widow Julia Martha Thomas was killed in her own home by her servant Kate Webster, who also stole her victim's clothes, property and identity.