Arvind Kejriwal's Principal Secretary Rajendra Kumar has been arrested by CBI along with four others.
Delhi Chief Minister Arvind Kejriwal's Principal Secretary Rajendra Kumar and four others are being confronted by the CBI officials in connection with its probe in an alleged corruption case.
Sources said today that all the accused are being confronted with each other to further prove their involvement in alleged graft.
The evidence gathered by the CBI officials during their investigation so far are also being shown to the accused, explaining the details of alleged monetary benefits taken by them, they said.
Meanwhile, the agency officials claimed to have found the trail of money, which was given to the accused as bribe, through different means, the sources said.
Mr Kumar and four others were arrested by the CBI on Monday for allegedly showing undue favours to a private company in award of government contracts worth over Rs. 50 crore. They were yesterday sent to five days CBI remand by a court.
The arrest of top government official has triggered a political storm and the Delhi government accused the Centre of "political vendetta" and "paralysing" governance.
Mr Kumar, a 1989 IAS officer of union territories cadre, and Tarun Sharma, a Deputy Secretary in Mr Kejriwal's office, are those who have been arrested in the case. The other accused are-- Ashok Kumar, a former Delhi government employee and considered close aide of Rajendra Kumar, besides owners of a private firm Sandeep Kumar and Dinesh Gupta.
The CBI had registered a case in this regard in December last year alleging that Mr Kumar had abused his official position by "favouring a particular firm in the last few years in getting tenders of Delhi government departments".