Bhandari, against whom the department conducted searches in April last, is likely to be summoned for detailed questioning "as early as next week" to seek his explanation on
His bank transactions.
It is also likely to cover certain emails that were said to have been recovered from Bhandari who had purportedly deleted them from his system and were recovered by the tax sleuths later, official sources said.
Efforts to contact Bhandari did not fructify.
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The sources said registration of such a case will also enable the Enforcement Directorate (ED) to register a separate case under the stringent anti-money laundering laws.
ED is currently probing the case under the Foreign Exchange Management Act (FEMA), under which the dealings are civil in nature.
The department has already approached the British
ED has also served notice on him seeking details about his bank accounts, properties and other assets.
Sources said probe in the tax evasion and assessment of income of Bhandari and few others is on after the searches were conducted at multiple premises.
The taxman is said to have recovered certain emails that talk about renovation of a costly apartment in London in 2010 which was allegedly owned by Vadra, son-in-law of Congress President Sonia Gandhi.
The department has also written to the Financial Intelligence Unit to provide it with certain details of bank accounts and transactions which involve Bhandari and few prominent names in the political and bureaucratic circles.
It is expected that the taxman will soon get in touch with the Defence Ministry as Bhandari ran a consultancy firm and is said to have interests in procurements related to armed forces in the country.