The Central Bureau of Investigation (CBI) is the premier investigating police agency in India, and is an elite force which plays a major role in the preservation of values in public life and ensuring the health of national economy. It is a governmental agency under Government of India
It was only after the SC decided to monitor its investigations,[35][36][37] the CBI moved faster and arrests of high-profile persons were made.
CAG
who audits all receipts and expenditure of the Government of India and the state governments, including those of bodies and authorities substantially financed by the government. The CAG is also the external auditor of government-owned companies,… A CAG report on issue of Licences and Allocation of 2G Spectrum resulted in a huge controversy. The report estimated that there was a presumptive loss of 1,766.45 billion (US$30 billion).[22] In a chargesheet filed on 2 April 2011 by the investigating agency Central Bureau of Investigation (CBI), the agency pegged the loss at 309,845.5 million (US$5.2 billion)[23]
CVC
It has the status of an autonomous body, free of control from any executive authority, charged with monitoring all vigilance activity under the Central Government of India, and advising various authorities in central Government organizations in planning, executing, reviewing and reforming their vigilance work.
Doe
The Directorate General of Economic Enforcement is a law enforcement agency and economic intelligence agency responsible for enforcing economic laws and fighting economic crime in India. It is part of the Department of Revenue, Ministry of Finance. It comprises officers of the Indian Revenue Service