CARLSBAD, Calif.—A fiery three-vehicle crash in Carlsbad left one person dead March 30 and two others injured. The pileup occurred about 6:45 a.m., when an eastbound Mazda MX-5 slid out of control at high speed across a rain-slick stretch of roadway in the 2700 block of Faraday Avenue, according to the Carlsbad Police Department. The…