A serial killer dubbed Japan's "black widow" received a death sentence Tuesday for the murders of her husband and two common-law partners, as well as the attempted murder of an acquaintance, between 2007 and 2013.The Kyoto District Court acknowledged that Chisako Kakehi, 70, used cyanide in the four cases and determined that she is competent to stand trial and can be held responsible for the crimes despite having been diagnosed with dementia in a psychiatric test."It was a heinous crime driven by greed for money. The death sentence cannot be avoided even after fully taking into account deme…READ FULL ARTICLE