A former client of K&L Gates has sued the firm, a Dallas partner in the firm and another lawyer, alleging they all committed gross negligence by convincing him to invest $5 million in an oil and gas deal that left him "unprotected."

The background to Hazen NG v. K&L Gates, Julie Lennon and John Hardin, which was filed on Feb. 21 in Dallas’ 193rd District Court, is as follows, according to the original petition. Hazen NG (which the petition calls "Hazen") has had an ongoing attorney/client relationship with K&L Gates, Dallas K&L Gates partner John Hardin and Julie Lennon of the Gaedeke Group for numerous years.