Political experts have said former NSW Riverina MP Daryl Maguire could face another round of public hearings as part of a corruption inquiry.
The Independent Commission Against Corruption (ICAC) issued a short statement this week saying that its "Operation Keppel investigation is ongoing".
Operation Keppel is ICAC's probe into claims Wagga Wagga MP, Mr Maguire breached public trust by improperly using his parliamentary positions for personal gain, which generated four weeks of public hearings in September.
Charles Sturt University politics professor Dominic O'Sullivan said it was possible that ICAC could hold more public hearings based on its statements, including its delay in taking submissions from prior witnesses in December.
"ICAC has said that its investigation is not complete, that it has work to do, so one would assume [more hearings] are a possibility," he said.
"Whether it is a likelihood will be revealed in time.
"The ICAC, like any judicial body, does things very deliberately and thoroughly so it won't be rushing these things."
A NSW budget estimates hearing heard testimony last week that a Transport for NSW director was asked in 2018 by the agency's deputy secretary to investigate claims that Mr Maguire obtained confidential information about a planned motorway route.
One Nation MLC Mark Latham has claimed that advance knowledge of the route was commercially valuable to Country Garden a company with links to Mr Maguire that had started buying hundreds of hectares of land in the motorway's path.
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University of NSW Arts and Social Sciences honorary professor Mark Rolfe said the ICAC investigation into Mr Maguire could be widening as Labor and One Nation made additional referrals to the corruption watchdog.
"I don't know the mind of ICAC and they keep their cards close to their chests, but there have been further allegations about Mr Maguire and his connection to Country Garden [Chinese investment company] having very detailed maps of the proposed M9 road in south-west Sydney," Dr Rolfe said.
"Daryl Maguire's name keeps popping up in these sorts of places, so I'd say the inquiry might be widening."
Professor O'Sullivan said it was difficult to draw the line between the genuine concerns and political attacks when looking at the merits of ICAC referrals made by opposition MPs.
ICAC yesterday said it would hold public hearings from March 29 for a separate investigation into NSW Drummoyne MP and former sports minister John Sidoti over claims that he "improperly influenced...development controls affecting land" in Sydney.