I work on campus (very very close to the engineering building) and I previously lived near Brookline. So all of this hits home.
But what got me was the tipster who blew wide open the case is reportedly a homeless Brown graduate who lived in the basement of the engineering building (a la South Korean film Parasite). It made me so sad but also not surprised, that building does have a single occupancy bathroom with showers; and no keycard access was needed in the evening until 7pm.
So it made sense to me that he or she would've used that building for shelter and comfort. Also it didn't boggle my mind at all that a Brown grad (from the picture, the tipster looked like a artistic Brown student vs. the careerist type) would be homeless - given that I known many of my classmates who have a certain personality, brilliant but also idealistic/uncompromising that made them brittle unfortunately in a society that rewards conformity, settling and stability.
I can't get over the fact that two Brown student whom presumably have fallen on the wayside of society have chosen two different paths, (1) the homeless guy who still perseveres even in the basement of Barrus & Holley for 15 years a la Parasite after 2010 graduation but still has the situational awareness and rises to the occasion to give the biggest tip to the Providence Police, (2) the other guy who harbors so much resentment over a course of 25 years to plan a trip from Florida to gun down innocent kids who are 18 and 19 and his classmate when they were 18 and 19 year old.