Sean Collier’s 2-year-old cousin crouches by the new memorial following Wednesday’s dedication. The ceremony was attended by hundreds of people, including students, MIT President L. Rafael Reif, and police officers from nearby towns. vivian hu—The Tech May. 9, 2016 Facebook Twitter Reddit Print Sean Collier’s 2-year-old cousin crouches by the new memorial following Wednesday’s dedication. The ceremony was attended by hundreds of people, including students, MIT President L. Rafael Reif, and police officers from nearby towns. vivian hu—The Tech