MUMBAI, March 23 -- A special court has allowed an association of investors to assist the prosecution in liquidation of attached properties worth about Rs.2,000 crore belonging to erstwhile National Spot Exchange Limited (NSEL).

The court, set up under the Maharashtra Protection of Interest of Depositors (in Financial Establishments) Act, asked the association, NSEL Investor Action Group (NIAG), to file written notes for arguments and even make oral submissions but with a rider that the court will decide what is crucial and critical.

The court further directed the intervenor (NIAG) to refrain from leading the evidence and from pressuring the public prosecutor.

The NSEL scam, which came to light in 2013, involves defrauding 13,000 inves...