UPDATE 1 — Judge dismisses indictment of actor Timothy Busfield on child sexual assault

(Adds quote, background paragraphs 2-4) By Lisa Richwine LOS ANGELES, Oct 16 (Reuters) — A judge in New Mexico on Friday dismissed sexual assault charges against "West Wing" actor Timothy Busfield, according to court documents. "The prosecuting attorney failed to act in a fair and impartial manner," wrote Judge Joseph Montano wrote. Busfield, 69, was indicted by a grand jury in February on on child sex offenses and accused of groping a young boy on the set of a television show he was directing and producing. Prosecutors alleged that Busfield had improperly touched two young cast members — twin boys — while directing the Fox TV drama "The Cleaning Lady" in Albuquerque, New Mexico. Busfield steadfastly professed his innocence, calling the allegations against him "lies." (Reporting by Lisa Richwine; Editing by Chris Reese and Franklin Paul) ((lisa.richwine@reuters.com)