NEW YORK — RJ Luis Jr scored 27 of his 29 points in the second half as top-seeded St. John’s pulled away for an 82-66 victory over second-seeded Creighton on Saturday night to secure its first Big East conference tournament championship since 2000.The Red Storm (30-4), ranked No. 6 in the nation, won their ninth straight game by overcoming an early eight-point deficit a day after rallying from a 15-point deficit to beat Marquette in the semifinals.The tournament’s most valuable player, Luis was 1 of 5 in the first half before making 10 of 13 shots as St. John’s dominated the second half. The Red Storm made 14 straight shots to turn a 41-38 deficit with 12:53 left into a 70-55 bulge with 5:16 remaining.Luis scored 12 points during the decisive barrage, which started when Zuby Ejiofor hit a jumper and completed a 3-point play to forge a 41-41 tie. The Red Storm never trailed after Deivon Smith’s tough jumper in the lane countered a Steven Ashworth 3 and put the Red Storm up 45-44 with 11:07 left.Luis took over from there, hitting two 3s and three layups in the Red Storm’s dominating 25-11 blitz.Ejiofor followed up his career-high 33-point showing against Marquette by contributing 13 of his 20 in the second half. Kadary Richmond contributed 12 points and 12 rebounds as the Red Storm shot 71.9 percent in a 57-point second half and 52.3 percent overall.