As the title suggests we may have a trained terrorist assassin on the loose in New England murdering academics. Speculation has run wild on the Internet looking at motives from state and non-state actors:

China
Palestine 
Iran

https://www.foxnews.com/us/evidence-shows-deadly-brown-mit-shootings-may-linked-sources-say-report

I have no idea myself, I only know that murder is bad. As always, be careful and watch out for your loved ones.

...and he's dead.
48 year old Portuguese national found dead at New Hampshire storage facility.
Watching a press conference on it now.
https://www.yahoo.com/news/articles/police-investigating-possible-between-brown-204102548.html

Yep, leaving nothing but broken lives and questions behind. What an asshole.