The 1984-batch IAS officer was arrested under the provisions of the Prevention of Money Laundering Act, 2002, following two FIRs filed against him in March and September 2010, days after the Supreme Court vacated the interim stay on his arrest.
The agency claimed that Sharma was not cooperating with the investigators and that his custodial interrogation was necessary.
Sharma was summoned to the ED office yesterday to record his statement.
The agency said that "given the way Sharma behaved with the investigating officer suggested that he was actually involved in money laundering as defined in section 3 of PMLA, 2002 and punishable under section 4 of the Act."
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The case pertains to the sanction of government land in Bhuj for industrial use to Ms Welspun India Limited and its group companies, Welspun Power and Steel and Welspun Gujarat Style Roharan, as part of a suspected quid pro quo.
"Against this favour, he has received gain to the tune of Rs 22 lakh in the name of his wife Shyamal P Sharma within a short period of 15 months by just investing Rs 1 lakh (in January 2008) in one Ms Value Packaging," the ED probe report said.
The agency alleged that Sharma had remained evasive during questioning in the past as well.
He had approached the Supreme Court in 2013 seeking taking cognisance of audio tapes related to alleged illegal snooping of a young woman architect under then Narendra Modi government in the state.
Two investigative news portals had claimed on November 15, 2013 that a senior BJP leader had ordered illegal surveillance of the woman at the behest of one "Saheb".
The ED had earlier attached Sharma's properties valued at
Rs 28 lakh, including a farm land at Dehgam and part of his house in Gandhinagar.
The ED had sent Letters Rogatory (LR) to the US and the UAE in 2014 after a special PMLA court in Ahmedabad had granted its plea on August 8, 2014.
"Reply from the US in execution of LR has been received which prima-facie shows that a few crores were credited in the account of a family member of Pradeep Nirankarnath Sharma from different accounts, including from certain accounts maintained in the UAE.
"These facts corroborate the depositions made by certain persons relating to hawala transfer of money by Pradeep Nirankarnath Sharma. The information received from the US also reveals the details of the bank account which was not disclosed by him," the ED release said.
"The other undisclosed accounts of Pradeep Sharma and his family members are under investigation," it said.
The agency will produce Sharma before the special PMLA court tomorrow.
Sharma had earlier claimed that he was being victimised by the BJP government in Gujarat for his knowledge of the illegal surveillance of the woman by government agencies.
However, the Supreme Court had told him to remove the portion of personal allegations, before dismissing his plea.