Prosecutors Officially Link Slain Boston Marathon Bombing Suspect To Massachusetts Triple Murder

A friend of Tamerlan Tsarnaev told investigators that Tsarnaev participated in the 2011 triple murder, according to a government court filing.

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“According to [Ibragim] Todashev, Tamerlan Tsarnaev participated in the triple homicide,” the filing reads.

Shannon Stapleton / Reuters

The three Waltham victims’ throats were slit on Sept. 11, 2011.

Dzhokhar Tsarnaev is facing 30 federal charges in connection with the April 15 bombing.

Jane Rosenberg / Reuters

Prosecutors forcefully argued the Dzhokhar Tsarnaev should not receive any more information and documents about the Waltham case.

In any event, the government has already disclosed to Tsarnaev that, according to Todashev, Tamerlan Tsarnaev participated in the Waltham triple homicide. Any benefit to Tsarnaev of knowing more about the precise "nature and extent" of his brother's involvement does not outweigh the potential harm of exposing details of an ongoing investigation into an extremely serious crime, especially at this stage of the proceedings.

Adrian Carrasquillo is the White House correspondent for BuzzFeed News and is based in Washington, DC.

Contact Adrian Carrasquillo at adrian.carrasquillo@buzzfeed.com.

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