A new bankruptcy filing accuses the chief financial officer of Boston’s failed IndyCar race of the “systematic looting” of the company and running its finances as his personal “piggy bank” — claims vigorously disputed by the targeted executive.

Lawyer Gary W. Cruickshank, trustee for Boston Grand Prix during its bankruptcy, yesterday filed a motion seeking to recover money from John Casey, the CFO.

“Casey used BGP as his personal piggy bank, paying hundreds of thousands dollars for personal expenses, including for tens and possibly hundreds of thousands of dollars for personal expenses charged on personal credit cards, diverting hundreds of thousands of dollars into a bank account he controlled, transferring tens of thousands of dollars to related entities, and failing to account for hundreds of thousands of additional dollars disbursed by BGP,” Cruickshank wrote in his filing to U.S. Bankruptcy Court.

Casey said the claims involve “a lot of hyperbole.”

“This is absolute nonsense,” Casey told the Herald last night.

“I have no concern about this whatsoever. If I have to go to court and fight this, then I’ll go to court. I will be exonerated. Accounting is not an art. It’s a science.”

After plans for the race fell apart earlier this year amid finger-pointing by city officials and IndyCar, Boston Grand Prix filed for bankruptcy in July, while still owing ticket holders $1.6 million.

Cruickshank wrote, “Casey never hired a bookkeeper for the Debtor or even purchased bookkeeping software to track the Debtor’s income and expenses. Casey testified that he kept track of accounts payable in his head.”

Casey denied that, saying he used a Microsoft Excel spreadsheet to keep track of the organization’s finances.

Cruickshank’s filing claims Casey also used checks drawn on Boston Grand Prix bank accounts to pay, among other things, $22,172 for his personal Porsche, $20,000 for his son’s BMW, $124,391.90 in personal credit card payments and $92,222.83 toward the mortgage on his Boxford home.

Casey said he had an unorthodox contract with Boston Grand Prix that allowed him to pay for personal expenses in lieu of salary.

On top of this, the filing said there are $862,580 in disbursements for which there is no documentation, claims Casey also disputes.

“I’m standing my ground here,” he said. “I’m not giving an inch.”