A makeshift memorial to MIT police officer Sean A. Collier was erected by a steady stream of visitors in front of Building 32 on Friday, Apr. 19.

Ho Yin Au—The Tech

May. 9, 2016

A makeshift memorial to MIT police officer Sean A. Collier was erected by a steady stream of visitors in front of Building 32 on Friday, Apr. 19. Ho Yin Au—The Tech