The seventy-seven-year-old Ardbo was reportedly suffering from cancer.
Their lawyers said there was no evidence to suggest that they had entered into a criminal conspiracy with former prime minister Rajiv Gandhi to get the Rs 14.37 billion contract awarded to Bofors.
In the wake of the 2G acquittals, here are a few high-profile cases in which question marks were raised by various courts over the CBI's probe.
'Judging by the conduct of two governors of Kerala and one governor from Kerala, Congressmen treated Raj Bhavan as a transition point before taking a flight back into active politics.'
Industry says though most pending issues have been deliberated upon by Tourism ministry, they are yet to be implemented
It said it was not convinced with the grounds of the CBI to condone over 4,500 days' delay in filing the appeal. The CBI had filed the appeal on February 2 this year.
After lot of deliberation, the CBI this year got the nod from the NDA government to file an appeal in the apex court.
Chinese equipment contracts had been given by many public sector undertakings and government companies for their networks, even in sensitive places such as the north east.
The CBI had moved the trial court seeking permission for further probe in the matter saying it had come across fresh material and evidence.
The CBI filed the appeal against the May 31, 2005 decision of the high court by which all accused, including Europe-based industrialists Hinduja brothers, were discharged from the Rs 64-crore pay-off case.