Gupta was arrested on the basis of information given by Rajiv Saxena, who had recently turned approver in the case following his extradition from UAE and subsequent arrest by the ED.
The probe which began in July 2017 after the government had ordered a probe into the Pilatus deal. The CBI had begun an investigation into the Rs. 2900 crore Pilatus deal which allegedly involved an absconding arm dealer, Sanjay Bhandari, close to both Rahul Gandhi and Robert Vadra.