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Navistar Sues Its Former Auditor Deloitte & Touche

Navistar International Corp., 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.