It’s the scandal that won’t go away at city hall.

Another probe into the construction of the police headquarters in downtown Winnipeg could take place.

Documents obtained by RCMP prior to executing a search warrant in December 2014 were unsealed Monday.

The information suggests Caspian Construction may have inflated, manipulated and altered invoices on the project.

The building costs have soared more than $75 million over budget.

On Tuesday, Mayor Brian Bowman said once the RCMP probe into the matter is complete, the city will decide what actions need to be taken.

Bowman isn't ruling out the need for an independent public inquiry or a review of previous contracts with the construction firm if questions remain.

"All options will be on the table here at the City of Winnipeg to do our part to ensure that there is value for money that is sent here to city hall," said Bowman.

The police headquarters project has already been the subject of two audits.

No charges have been filed in the case and none of the allegations have been proven in court.