<P> On the Russian - language social - networking site VK, Tsarnaev described his "world view" as "Islam" and his personal priorities as "career and money". He posted links to Islamic websites, links to videos of fighters in the Syrian civil war, and links to pages advocating independence for Chechnya . Dzhokhar was also active on Twitter . According to The Economist, he seemed "to have been much more concerned with sport and cheeseburgers than with religion, at least judging by his Twitter feed"; however, according to The Boston Globe, on the day of the 2012 Boston Marathon, a year before the bombings, a post on Tsarnaev's Twitter feed mentioned a Quran verse often used by radical Muslim clerics and propagandists . </P> <P> In 2012, Arlington Police ran a warrant check on Tsarnaev and checked his green Honda when they were investigating a report of underage drinking at a party in Arlington Heights . </P> <P> At the time of the bombing, Tsarnaev was a sophomore living in the UMass Dartmouth's Pine Dale Hall dorm . He was struggling academically, having received seven failing grades over three semesters, including Fs in Principles of Modern Chemistry, Introduction to American Politics, and Chemistry and the Environment and had an unpaid bill of $20,000 to the university . He was known to be selling marijuana to make money . </P> <P> A triple homicide was committed in Waltham, Massachusetts, on the evening of September 11, 2011 . After the 2013 Boston Marathon bombings, the case was re-examined, and authorities said the Tsarnaev brothers may have been responsible for the murders, that forensic evidence connected them to the scene of the killings, and that their cell phone records placed them in the area at the time of the killings . In May 2013, Ibragim Todashev, a 27 - year - old Chechen native and former mixed martial arts fighter who knew Tamerlan Tsarnaev, was shot and killed in Orlando, Florida, by law enforcement officers who had been interviewing him about the Waltham murders as well as the bombings . The FBI has alleged that just before he was killed, Todashev made statements implicating both himself and Tamerlan Tsarnaev in the Waltham murders--saying that the initial crime was a drug robbery, and the murders were committed to prevent being identified by the victims . </P>

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