Representatives of former Nissan Motor Co. Chairman Carlos Ghosn criticized Tuesday the carmaker's investigation into his alleged misconduct, saying the probe was "flawed, biased and lacking in independence from its inception."

"It was initiated and carried out for the specific, predetermined purpose of taking down Carlos Ghosn to prevent him from further integrating" Nissan and its alliance partner Renault SA, which would have "threatened the independence" of the Japanese firm, the representatives said in a statement.

They said Nissan never interviewed Ghosn concerning the matters under investigation, and that the company's longtime counsel with which the probe was conducted had given legal advice about those same matters subject to the investigation.

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The probe also failed to discover improper remuneration of former Nissan CEO Hiroto Saikawa, while Nissan continues to employ Hari Nada, a Nissan executive who led the probe and has "pled guilty to a crime," the representatives said.

Nada reportedly worked as a close aide to Ghosn, advising him on some of the issues under scrutiny by Japanese prosecutors, and agreed to cooperate in return for not being prosecuted.

The Japanese carmaker said Tuesday in its first statement since its former chairman jumped bail and escaped from Japan to Lebanon late last month that there was no change to its plan to take legal action over his alleged financial misconduct.

Its internal probe has concluded that the company incurred a loss totaling over 35 billion yen ($323 million) due to financial misconduct by Ghosn and former Representative Director Greg Kelly, who has been charged with conspiring with the former chairman.

The company has said it is set to bring a damages suit against Ghosn over the alleged misconduct.

Ghosn plans to hold a press conference on Wednesday in Beirut.