Insurance firms Lexington Insurance Co., of Massachusetts, and Beazley Insurance Co. filed suit in Cook County, Ill., claiming professional malpractice by security firm Trustwave Holdings Inc. in the 2008 data breach of Heartland Payment Systems. Trustwave certified the company as PCI DSS-compliant in 2007 and 2008 after its audits. The lawsuit came in response to a Trustwave court filing on June 22 in Delaware that petitioned the court to rule the insurers’ demands moot due to statute of limitations on the case.”]