the victims who were each killed in different rooms in this house were covered in marijuana. investigators describe it as a symbolic gesture. robbery wasn t a motive because police found thousands of dollars in cash. the theory is that the victims knew their killers. we have no evidence of a break in the apartment and we have other indicia that the decedents and the assailants were known to each other. we know there are at least two people who are not in that apartment now that were here earlier. reporter: that was 19 months ago but the trail went cold. no arrests, no named suspects. but the attack on the boston marathon revived interest in the case because one of the victims, 25-year-old brendan mass, was close friends with bomb suspect tamerlan tsarnaev. tsarnaev was a golden gloves boxer. his buddy was trained in mixed martial arts. together they would spend hours sparring here at this gym. tsarnaev was a golden gloves boxer. his buddy trained in mixed martial arts. the two frie
the stories we heard of them mixing in pubs, almost even drinking alcohol, they will do whatever it takes to go undetected, because they know that there will be people out there looking for this sort of behavior, and they are the more in fact, i would be more worried about those because they would be the ones who would be able to reap much more devastation. that begs the question, what do we do about this type of person who doesn t change his or her behavior and blends in with everybody else, and the report mentioned it accurately. it s like looking for a needle in a haystack. that leaves us only with one other option. that s what i speak about a lot. that is that we have to ask the question what makes angry young muslims at the age of 16, 17, 18 years old or around there, join this form of or this phenomenon in the first place. why do they believe that this is a legitimate vent for any frustrations they may be feeling and why do they no longer join militant communist organizations a