Mary Ann Cotton

In 1852, Mary Ann Cotton married a laborer. Seven out of eight of her children died of gastric fever. Later her husband died too of stomach sickness. She remarried and her second husband died and soon did her mother pass away. Later her last remaining child and her second husband’s children died. Her third husband kicked her out. Later her fourth husband died as well as his sister, his son and a child he had fathered with Mary. After 20 years of mysterious deaths, the police investigation found she was poisoning her victims with arsenic in order to collect insurance money.