Navistar International Corp. (NAV), a maker of medium- and heavy-duty trucks, accused its former auditor Deloitte & Touche LLP of professional malpractice in a lawsuit seeking $500 million in damages.

Navistar claimed shoddy work by Deloitte & Touche accountants from 2002 to 2005 forced the company to revise its financial statements, according to a 134-page complaint filed today in Illinois state court in Chicago.

Read the complete Bloomberg story, “Navistar Sues Its Former Auditor Deloitte & Touche.”