A Japanese man acquitted of a 1966 quadruple murder in a retrial is set to file a lawsuit against the state for defamation after the prosecutor general called the ruling that found him not guilty "unacceptable," his lawyers said Thursday.Iwao Hakamata, 88, was acquitted by the Shizuoka District Court last September after spending nearly half a century on death row before new evidence led to his release in 2014. He was recognized that year as the world's longest-serving death row prisoner.While the prosecutors did not appeal, Prosecutor General Naomi Unemoto said in a statement issued Oct. 8…READ FULL ARTICLE