Surviving Boston bomber knew his brother had killed drug dealers in 2011 triple homicide, prosecutors claim

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http://www.dailymail.co.uk/news/article-2789585/surviving-boston-bomber-knew-brother-killed-drug-dealers-2011-triple-homicide-prosecutors-claim.html

    Tamerlan Tsarnaev has long been linked to the killings but case never solved
    If true, police will come under fire for failing to catch him before 2013 attack 
    Tamerlan was killed three days after Boston Marathon bombings
    His surviving brother's defense team plans to portray Tamerlan as a bully
    They will bring witness who will testify that Dzhokhar knew about killings