Enforcement Directorate started grilling Robert Vadra and his mother Maureen Vadra in connection with the Bikaner land scam in Jaipur on Tuesday. AICC general secretary and his wife Priyanka Gandhi Vadra accompanied them to the office. This is Vadra's fourth appearance before the agency and first in Jaipur. The ED had filed the case in 2015 after it took note of several FIRs filed by the Rajasthan Police, which received complaints from the Bikaner tehsildar on alleged forgery in land allotment in the area.