(May 18, 2017, 3:47 PM EDT) -- DENVER — A Colorado federal judge on May 17 found that a professional liability insurer has a duty to defend two out of three insureds against underlying claims that they operated as a cartel and colluded to fix standard au pair wages (Colony Insurance Co. v. Expert Group International Inc., et al., No.15-02499, D. Colo., 2017 U.S. Dist. LEXIS 75073)....