The Customs department has said that the smuggled money formed a part of a bribe Unitac Builders was alleged to have paid in connection with a Life Mission housing scheme in Vadakancherry.
The Speaker's office confirmed that he was questioned at his Thiruvananthapuram residence on Friday evening by a team led by Customs Superintendent Salil.
In its plea, the ED alleged that the FIR was registered against its unnamed officials with the ulterior motive of derailing the investigation into a large economic offence of smuggling gold.
Justice V G Arun, however, turned down ED counsel Thushar Mehta’s request for a stay on the case against the officials. The court had rejected the request last week also.
The second-phase investigation report submitted by the Enforcement Directorate before the Kerala High Court also contains corruption allegations against key members of the chief minister’s team.
Sarith said Swapna Suresh, a co-accused, told him that the consulate was informed about the package by M Sivasankar, who was then the chief minister’s principal secretary.
Swapna's statement also revealed that Sivasankar had shares in many companies including those located in the Technopark, Thiruvananthapuram.
The leaked document said the Speaker handed over a bag containing the money to Swapna and Sarith at a flat in Royal Apartments, opposite the Trivandrum International Airport.
Recently, a few police personnel have given statements before the Crime Branch questioning the integrity of the ED.
The legal advice was sought after considering the probe team’s report in connection with Swapna's audio clip.