It’s possible that one or more of the three murder victims became aware of something suspicious about Tamerlan and/or his brother. Supposedly Al Qaeda and similar terror groups like to “blood” their recruits with some murderous activity before bringing them into more sensitive plots.
However, the fact that someone so close to Tamerlan MIGHT easily have led investigators to focus upon Tamerlan makes me wonder if it was more along the lines of a fracas over the anniversary of 9/11, and/or if Tamerlan said or did something that revealed his jihad loyalties, etc.
Just guessing, but if the Boston Bombers were involved in this past triple murder (on 9/11/2011) I’d suspect it was something sudden, as in a confrontation about 9/11 or jihad/Islam etc. that spun out of control.... or the roommate learned something about Tamerlan that meant (to a terrorist cell) that the guy had to be gotten rid of fast.
Blood initiation is always important in preparation. Secures commitment and removes exit passageways.
http://alyssalindley.tumblr.com/post/48368749553/ive-met-the-boston-bombers
the mother said 9/11 was an inside job.