The agency has concluded its investigation in the case and has sent its file to the Directorate of Prosecution seeking legal opinion on the evidence gathered and charges levelled against the accused, sources said.
They said the agency would name as accused Kumar, former Railway Minister P K Bansal's nephew Vijay Singla, businessman Manjunath besides middlemen in its first charge sheet which might be filed before July 3.
According to them, Bansal may not be named as accused in the the first charge sheet filed by the agency but his reference may be made and facts emerging from his interrogation may also form the contents of the charge sheet.
However, they said agency is likely to keep open the probe into the alleged role of Bansal and if it manages to gather evidence linking him with the money trail a supplementary charge sheet would be filed.
CBI sources said they have gathered evidence, a major portion of which contains tapped phone conversations, besides recoveries made from Singla's office and home.
During questioning, he has maintained that he has done no wrong in the appointment of Kumar as member of the Railway Board, a post equivalent to the secretary in government.
Kumar had allegedly paid Rs 90 lakh to Singla for retaining additional charge of General Manager (West) after his promotion as Board Member (Staff). This was allegedly part of Rs 10 crore deal Kumar struck with Singla for his elevation as Member (Electrical) in the Board.
