Chacko wants CBI to question Antony, Chandy in ISRO spy case By IANS | 5 Views PC Chacko. (File Photo: IANS). Image Source: IANS News Thiruvananthapuram, April 16 : Former top Congress leader P.C. Chacko on Friday asked the CBI, which has been ordered by the Supreme Court to reinvestigate the ISRO spy case, to first question A.K. Antony and Oommen Chandy. Chacko recently quit the Congress and rejoined the NCP and was seen campaigning for the Left in Kerala. He shared the campaign space with Chief Minister Pinarayi Vijayan and was seen slamming the Congress leadership here. Chacko was wanting to contest the Assembly polls, but after failing to get a seat decided to leave the Congress.