Mary Ann Cotton ... The Arsenic Serial Killer

We have all heard about spouses killing one another for insurance money, of black widows killing their husbands out of resentment, of deranged parents ending their own children’s lives. But perhaps there is no woman as prolific at doing all this than Mary Ann Cotton. One of… if not England’s first serial killer. A woman who killed around 21 people, all for greed and enjoyment. This is the Arsenic Killer Mary Ann Cotton.