Anto Augustine, Josekutty Augustine and Roji Augustine where nabbed during a vehicle inspection held on Wednesday.
The Crime Branch team also recovered gold coins from a special locker which was used by the accused for keeping documents related to illegal transactions.
She was reportedly questioned over whether she had any knowledge of her husband's alleged involvement in the production of pornographic content.
The SIT, that began the probe into the controversial order of the revenue department, seized the files leading to it. The computer logs of the electronic files have been frozen.
Police sources said that the businessman had a 'Plan B' in place after 'Hotshots', the OTT app at the centre of the illegal activity, due to policy violations, had been taken down.
The ED said money laundering worth crores of rupees had taken place as part of the fraud. The ED officials sought preliminary details of the case from the police.
Loans worth crores of rupees were advanced by the bank to the scamsters, but the loans were taken in the name of Left front members without their knowledge.
The voters' list that found its way to the public, including then opposition leader Ramesh Chennithala, were the ones kept sealed in the internal servers of the Chief Election Officer's Office.
Crime Branch SP Shah Nawaz will be heading the probe and the charges include sections of the IT Act which includes conspiracy and theft.
The Crime Branch police have Pujari's custody till Monday when he has to be returned to the Bengaluru jail.