Public prosecutors on Friday decided not to indict any of the 10 people accused of professional negligence over the collapse of an expressway tunnel that killed nine people and injured three others in Yamanashi Prefecture in December 2012.

The Kofu District Public Prosecutor’s Office found it difficult to prove the guilt of the accused, including Takekazu Kaneko, former president of Central Nippon Expressway Co., and Nexco Central, operator of the Sasago Tunnel on the Chuo Expressway, as well as maintenance supervisors at the firm and a Nexco Central subsidiary.

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