Neither Giriraj nor Sadhu alias Anirudh Prasad had specified the value of their stolen goods.
The MP has now claimed that money belonged to his cousin who is in realty, maize processing and poultry farm business in Nagpur.
Police said the note packet slips on the bundles of cash would provide a vital link of the source of the cash.
Giriraj Singh, however, said he would reply to all questions at the right time.
The JD(U) Wednesday stalled Assembly proceedings over the matter.
The Income-Tax department has already started an inquiry into the recovery.
Having been a former state president of Congress who joined the LJP before election, Kaiser is critical of his former party.
Earlier, three FIRs were filed against Singh after he said that those who oppose Narendra Modi should go to Pakistan.
The BJP leader, who was recently booked for his hate speeches, said this mindset was “posing a danger” to the country.
Singh had contested on BJP ticket from the Nawada parliamentary seat on April 10.
A case was lodged against Singh by Patna district administration for his alleged hate speeches during election campaign.
A Bokaro court had also rejected Singh’s anticipatory bail on similar charges.
A local court on Monday rejected the anticipatory bail petition of BJP leader Giriraj Singh who is facing non-bailable arrest warrant in connection with his hate speech made 10 days ago.
“They say those who do not vote for Modi should go to Pakistan. (I say) Those who vote for Modi should drown in the sea,” said Farooq.
Top BJP leaders have already pulled up Singh for making “irresponsible statements from time to time without party sanction”.