A former top bureaucrat of the farm ministry, who was arrested on the weekend over the murder of his son, has said the killing was prompted by the mass stabbing in Kawasaki near Tokyo last week, investigative sources said Monday.Hideaki Kumazawa, 76, a former vice minister for agriculture, forestry and fisheries, has told investigators that he feared his son might harm children like the assailant in the Kawasaki knife rampage.He heard his son, Eiichiro Kumazawa, 44, say he would "kill" students when he became angry at noise from an athletic meet at an elementary school near their house in T…READ FULL ARTICLE