The 21-year-old Cambridge man who was gunned down in the basement of one of Harvard's dorms earlier this week might have been supplying its inhabitants with drugs. The Harvard Crimson reports that text messages sent from Justin Crosby's phone to a student suggest he was selling marijuana to Harvard kids. The student was given the man's number because he was told he could provide drugs, and received messages like, "Im gud allday today just hit me up asap stuffs gunna b goin fast” from the number. The student said he bought drugs from Crosby before. Crosby was arrested in 2007 for possession of drugs, and he was visiting an unidentified student at the dorm before he was shot.