Three people have been arrested in connection with the robbery of a priceless Stradivarius violin, but the instrument has not been found, police said Wednesday. The three suspects — two men, ages 42 and 36, and a woman, 32 — were arrested Monday morning at their respective Milwaukee residences and remained in police custody Wednesday. One of the suspects has been linked to a prior art theft. The violin, crafted in 1715 and known as the Lipinski Strad after a former owner, was stolen from Milwaukee Symphony Orchestra concertmaster Frank Almond during an armed robbery Jan. 27. Almond had played...