Citing an appeals court order in Milan, Italy, he said that "in 2013, the (UPA-2) defence ministry had shown lax attitude towards submitting required documents and extensive delay led to an ineffective trial in the matter."
Congress should answer whom it was trying to protect in the scam by not submitting the document, he said.
Thakur requested the Defence Minister to find out the facts and reasons for delay in submitting the documents.
"These allegedly included FAM - 16 mn Euros, and AP - 3 mn Euros. Who are these FAM and AP?" he said.
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"Congress and corruption have deep roots but they have achieved newer heights of shamelessness when they earned a bad name for the country by an international court," he said.
Thakur asked Congress to name the "beneficiaries" of alleged scam.
He also asked the government to take stringent action against all involved in "destroying" evidences in the case.