An SC bench led by Chief Justice Ranjan Gogoi today issued the directive while hearing a petition that CBI had filed on 4 February.
The agency had alleged that Kumar, who was the head of a Bengal government appointed special investigation team (SIT) in 2013-14 to probe the chit-fund scam, had tampered with and destructed evidence to shield some influential politicians.
CBI even questioned Kumar in Shillong from this 9-13 February over this.
During the hearing today, CBI maintained that Kumar had deleted some select numbers from the call lists of the mobile phones seized from Saradha Group head Sudipta Sen.
The agency, with the permission from the Union home ministry, got the original call lists retrieved from telecom service providers in June last year.
On hearing the argument, Chief Justice Gogoi observed if this was the case why the CBI did not bring this to the notice of the apex court last year. This is because CBI is probing the chit-fund scams following a directive of the SC.
The Chief Justice then directed the agency to furnish evidence in support of the allegation of call list tampering by Kumar within two weeks. The bench will hear the matter again on 26 March.