Japan's serial killer who murdered her partners with cyanide dies

Japanese serial killer Chisako Kakehi, dubbed the 'Black Widow', has died in a detention centre due to illness at the age of 78, the country's Justice Ministry said. Kakehi killed her 75-year-old husband and two other men, with whom she had entered into a relationship, using cyanide between 2012 and 2013. Kakehi had been awarded death penalty for her crimes.