A public prosecutor general in charge of the case said earlier that Bucher, formerly of the Societe Generale's Taiwan office from 1986 to 1992, would "lend a hand in the investigation."
President Chen Shui-bian (
The corruption scandal first emerged following the death of naval captain Yin Ching-feng (尹清楓), head of the navy's arms acquisition office, whose body was found floating in the sea off the east coast of Taiwan in 1993.
It has been alleged Yin was murdered as he was ready to blow the whistle on rampant corruption in the military.
To date, 28 people, including 13 military officers and 15 arms brokers, have been jailed in Taiwan on charges of bribery and leaking military secrets, although no one has been charged over Yin's death.
Last week, six former naval officers, including vice admiral Lei Hsueh-ming, former head of the fleet control office, were indicted on charges of malpractice and forging documents in connection with the scandal.
All six have pleaded not guilty.
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