JAPAN: It all began with a family squabble and ended in tragedy when a small girl was stabbed to death by her elderly grandfather in a case that shocked the country. The 88-year-old, Susumu Tomizawa, admitted to killing his 16-year-old granddaughter, Tomomi, two years ago, but said that he doesn’t remember it happening. Tomizawa has Alzheimer’s disease, a neurological condition …