OTTAWA Canada (AFP) — Canada’s auditor general yesterday released a scathing report on senators’ expense claims and called for federal police to investigate.

The report is the culmination of two years of scandal in the Upper Chamber that led to the suspension of three Conservative senators, one of whom is now on trial for fraud.

In it, Auditor General Michale Ferguson calls for “transformative change” in the oversight of senators’ expenses.

He reviewed the claims of 116 senators from April 2011 to March 2013, and found 30 out of them filed inappropriate expenses totalling nearly Can$1 million.

These ranged from a few thousand dollars to more than Can$175,000 for the top spender — a now retired Liberal senator from Manitoba.

The 30 senators mentioned in the report will be required to pay back the funds, or appeal through an independent arbitrator.

And nine of them could face criminal prosecution.

Meanwhile, the political fallout could hurt Prime Minister Stephen Harper’s re-election hopes in October, as many of the senators were appointed by him.

Senate leaders said they would review the auditor’s recommendations, but were noncommittal about implementing them.