star guard greyson allen caught purposely tripping an opposing player again. player's reputation severely hurt. >> i made a really bad play. sor sorry. i'm sorry to my team. >> known for strong moves, allen has a reputation for dirty play. february 8th, his first tripping incident against louisville. two weeks later, another takedown against florida state. now, a third foul. some say is bigger than the game. >> sportsmanship is something we value as american sports fans. what greyson allen is doing with the tripping is the opposite of that. >> already a superstar at one of the nation's most prestigious universities, allen skipped the nba draft to play another year with du. s krzyzewski -- >> what happened was unacceptable. he knows it. >> says he's both allen's coach and teacher. and the lesson he is giving is bigger than basketball. miguel almaguer, nbc news. >> you hate to see like such a nice sport, especially at a collegiate level, have that kind of ugliness in the game. only hope that he's learned from these mistakes and going forward does not repeat them

. >> and duke haters may be relishing greyson allen's tantrum on the bench. he received a foul for deliberately tripping a player. his third trip this year, who reportedly apologized. however, after duke's 72-61 win, he said sorry after they won the game. i'm not sure if that counts. >>> all right, this morning, we're going to take you to mexico where the death toll is expected to rise from the massive explosion add a fireworks market just outside mexico city. two days since the blast, crews are still searching for people who are missing and for the specific skauz of the explosions. kerry sanders is live in mexico city. kerry, what are investigators saying today? >> well, officially, the authorities say 33 people have died, but they do indeed expect the death toll will rise. the market is one where all of this concentration of fireworks led to the disaster. it was all in one area about the size of four football fields. it was just so much, they estimate maybe 20 tons of fireworks all compact in there. when it went off, there was a chain reaction. to give you