Saxena, a Dubai-based businessman, was extradited from Dubai on January 31 and sent to four-day custody of the Enforcement Directorate (ED) the same day.
The court had allowed his custodial interrogation after the agency alleged that he and another accused provided global corporate structure to launder money.
The ED had alleged that in connivance with another accused, Guatam Khaitan, a Delhi-based lawyer, Saxena provided a global corporate structure for laundering illegal proceeds of the crime for payment to various political persons, bureaucrats and Air Force officials to influence the contract to supply 12 VVIP helicopters in favour of AgustaWestland.