Carole Ghosn has increasingly emerged as a key figure in the case surrounding her tycoon husband, who is in detention facing multiple allegations of financial malpractice.
"She responded in good faith as she had promised to," he said, but declined to offer specifics of what was discussed during the nearly three-hour session.
According to a source close to the matter, some of the USD 5 million was funnelled to a British Virgin Islands-listed company -- which has Carole Ghosn registered as president -- to purchase a luxury yacht.
The boat, 37 metres (120 feet) long and weighing nearly 300 tons, is worth more than USD 13.5 million, according to this source, who asked to remain anonymous.
Carlos Ghosn denies all allegations made against him and slammed "back stabbing" Nissan executives in a video message aired Tuesday, during which he said he was a victim of a "plot" from those who feared he would tie Nissan closer to its French partner Renault.
Prosecutors have until April 14 to question the auto sector legend after which they can apply for a further 10-day period of custody.
Ghosn already faces three formal charges: two of under-reporting of his salary in official financial documents, and a further charge of seeking to shift investment losses to the firm.
He has not been formally charged with any allegations linked to the Oman case.
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