It is still unknown how the lawyers in Sendai found that the bill had no autographs and how they obtained the autographs of the prosecutors in Maebashi City which was far from Sendai.
仙台の弁護士が、何故、起訴状の署名が代筆だと気づいたのか、遠く離れた前橋の検察官の直筆署名をどうやって手に入れたのかは不明のままである。