Prosecutors may not indict four AUM Shinrikyo cult-linked suspects arrested over the 1995 shooting of the then National Police Agency chief due to a lack of credible evidence, investigation sources said Sunday.
As doubts linger over the credibility of testimonies by former police officer Toshiyuki Kosugi, among the four arrested, prosecutors believe it would be difficult to sustain a trial without being able to pinpoint who actually shot Takaji Kunimatsu, the sources said.