A public prosecutor arrested last year renewed his charges against his former colleagues Tuesday, repeating his claim that money meant to pay off informants is instead going toward wining and dining.

The former head of the public security department at the Osaka High Court Prosecutor's Office describes his arrest and firing as part of a conspiracy to keep his charges from gaining traction.

In a news conference at the Foreign Correspondents' Club in Tokyo, Tamaki Mitsui, 58, demanded that public prosecutors' offices acknowledge how "research activity funds" are actually used and apologize to the public.