A group of House Republicans has called for a criminal investigation into whether Jon Corzine, a former Democratic governor and senator from New Jersey, lied before Congress in 2011.

In a letter to Attorney General Eric Holder on Friday, the 18 lawmakers said that new evidence revealed in a civil case against Corzine contradicts his congressional testimony and may indicate he committed perjury.

“It is outrageous and unacceptable to let this discrepancy go without a formal criminal investigation,” Rep. Michael Grimm (R-N.Y.), the lead signatory of the letter, said in a statement. “Mr. Corzine has a duty to be honest with the customers from whom he stole money as well as the Members of Congress to whom he testified. Any refusal to move forward with an investigation would be a gross injustice.”

Corzine was the head of the financial firm MF Global when it collapsed in October, 2011 in one of the biggest bankruptcies in U.S. history. As much as $1.6 billion in customer funds that should have been segregated and protected went missing.