Rajender Gupta, Principal Secretary to Delhi Chief Minister Arvind Kejriwal, is being questioned by the CBI for the second consecutive day

Which file was CBI looking for in my office? DDCA files in which Arun Jaitley is in dock. I was about to order a commission of enquiry — Arvind Kejriwal (@ArvindKejriwal) December 15, 2015

Arvind Kejriwal's top bureaucrat arrived at the CBI headquarters again this morning after he was questioning for hours and released late last night on a day of dramatic developments that saw the Delhi Chief Minister calling Prime Minister Narendra Modi a "coward and psychopath" over daylong raids at his office.Mr Kejriwal said he was the target of the raids, not his principal secretary Rajender Kumar, who has been accused of corruption. Rajender Kumar, an IAS officer , has been accused of setting up various companies that were given work contracts without tenders at a huge loss to the Delhi government. The alleged irregularities took place before the Aam Aadmi Party (AAP) came to power, first in 2013 and then earlier this year.The CBI has charged Mr Kumar with criminal conspiracy and misconduct. The ruling AAP alleges that the evidence against him is not strong enough.Last night, Mr Kejriwal said the real reason for the raid was to search his offices for a file linked to cricket corruption allegedly involving Finance Minister Arun Jaitley Mr Jaitley said in response: "His morning statement appeared to be prima facie factually incorrect but his evening statement is absolutely rubbish. I don't think I should comment on rubbish."AAP alleges that there were financial irregularities when Mr Jaitley was the president of the DDCA or Delhi and District Cricket Association for 13 years till December, 2013."It has become important for me to tell why the CBI raided the Chief Minister's office. The CBI had come to search for the DDCA files which have Arun Jaitley's name, as he was the former President of DDCA and probe is on in the case. I want to tell Modi ji. You may have scared others but I am not going to be scared of CBI, You don't know what I am made of," Mr Kejriwal said.The CBI spent over 10 hours at the Delhi Secretariat, the headquarters of the city government, searching the office of Rajender Kumar, next door to the Chief Minister.AAP alleges that the CBI sealed the entire floor, not allowing access even to the Chief Minister's office.Mr Kejriwal reportedly worked from the office of his deputy Manish Sisodia.The CBI claims it has found about Rs. 13 lakh cash in raids on Rajender Kumar and another person. The agency said Rs. 3 lakh in foreign currency and Rs. 2.4 lakh cash was found from Rajender Kumar's home.The BJP called Mr Kejriwal's words against the PM "abominable" and said he owed an unqualified apology to PM Modi.Mr Kejriwal responded: "Apologise for what you have done and I will apologise for my words."