Slain Boston Marathon bombing suspect Tamerlan Tsarnaev took part in a 2011 triple homicide in a nearby town,according to a Chechen immigrant who was himself killed when approached by investigators for questioning,federal prosecutors said in newly filed court papers.
Ibragim Todashev,27,who has been identified as an acquaintance of Tamerlan,told investigators Tamerlan participated in the murders of three men found dead in September 2011 in an apartment in Waltham,Massachusetts,according to the filing.
Authorities believe the killings were drug related. The FBI has said Todashev was shot and killed by a federal agent about a month after the marathon bombings when he suddenly turned violent while being questioned about possible links to Tamerlan.
The latest disclosure about Tsarnaev came in a 23-page brief arguing against a motion by lawyers for his younger brother,Dzhokhar Tsarnaev,who is in custody on federal charges related to the marathon bombing.
Dzhokhar lawyers are seeking to force the government to share investigative materials pertaining to Tamerlan.
The Tsarnaevs are suspected of planting bombs taht killed three people and injuring 264 others during the Boston Marathon on April 15.