The dispute began taking shape in 2010, when Covington, representing Minnesota on a contingency basis, sued 3M for allegedly polluting state waterways by its handling of fluorochemicals once used in such products as 3M’s Scotchgard stain repellant.More than a year later, 3M’s lawyers sought to have Covington disqualified from the case. The company maintained that in the years before the 2010 water pollution suit, Covington had advised 3M on regulatory issues related to fluorochemicals. Lawyers for 3M later filed a separate lawsuit, accusing Covington of “side-switching” and breaching the firm’s contractual and fiduciary duties to the company.

Source: Covington Pays to End 3M Conflicts Row | Corporate Counsel