When a man convicted of a 1948 mass murder died of natural causes on death row 25 years ago, most people believed that meant unresolved questions about the "Teigin Incident" would never be answered.
However, a group of lawyers and experts in pharmacology and psychology are still struggling to unearth the truth behind the notorious mass-poisoning case and exonerate Sadamichi Hirasawa, who passed away May 10, 1987, in a prison hospital in Tokyo at age 95.
"We will complete presenting new evidence by the end of next year to reopen the case," said Nobuyoshi Araki, one of the lawyers involved in the petition for a posthumous retrial of Hirasawa, who was an artist.