Tokyo prosecutors suspect the wife of former Nissan Motor Co. Chairman Carlos Ghosn has contacted people linked to his case and unsuccessfully tried to bar her from seeing her husband while he is in detention, a source close to the matter said Tuesday.

Prosecutors asked the Tokyo District Court to effectively permit only lawyers to see Ghosn, who is currently being held at the Tokyo Detention House for alleged financial misconduct, claiming the former auto tycoon had his wife, Carole, contact the parties involved in his case to ask them to tell the same story as his, the source said.

Carole Ghosn may have made the contacts overseas as she traveled to France on April 5, the day after her husband was rearrested in Tokyo, and returned to Japan in time for pretrial questioning by prosecutors on April 11, the source added.