CANBERRA, AAP – Labor is demanding the federal government release previously withheld documents about the purchase of land near Western Sydney Airport now a police probe has concluded.

The Australian Federal Police did not find any evidence of criminal conduct, including offences of fraud, bribery or abuse of public office, involved in the 2018 Leppington Triangle land acquisition.

The government last year refused a Senate committee request for written briefings given to senior officials and ministers between November 2015 and 2019, citing the ongoing police investigation.

Labor’s infrastructure spokeswoman Catherine King now says there is no excuse to withhold the documents.

“Australians still don’t know how this scandal occurred and are being asked to trust the government that it won’t happen again,” she said on Thursday.

The government paid $30 million for the 12-hectare plot at Bringelly. It was worth $3 million.

The Australian National Audit Office found the infrastructure department did not exercise due diligence in the acquisition and fell short of ethical standards.

ANAO also determined the department’s approach to valuing land was not appropriate and this led to the government paying more than was proper.

It asked the AFP to investigate over concerns fraud may have been involved.

But police on Wednesday said investigators did not identify any evidence to support commonwealth offences including bribery, conspiracy to defraud or abuse of public office.

Investigators did not find any evidence of criminal offending by commonwealth officials or other people involved in the purchase following a detailed analysis of documents, payments and interviews with department staff.