The electronic discovery firm Redgrave LLP launched a new office in Chicago this month headed by former Dentons US LLP partner Christopher Q. King.Redgrave, which launched in August 2010, focuses on legal issues arising out of the intersection of law and technology.The new office at 30 S. Wacker Drive adds to the firm’s existing locations in Washington, D.C., Chantilly, Va., San Francisco, Minneapolis, and Cleveland.King, who joined Dentons predecessor Sonnenschein Nath & Rosenthal LLP 33 years ago, founded and …