BOSTON — The brother-in-law of former Democratic Massachusetts Gov. Deval Patrick has been arrested for violating a restraining order in an ongoing criminal case.The Boston Globe reports that Bernard Sigh, 66, was arrested Friday on a Milton police warrant.According to the Norfolk district attorney's office Sigh tried to contact the victim in a domestic assault case.Sigh pleaded not guilty at his arraignment in Quincy District Court Friday afternoon.