A report from My Fox Boston says Tamerlan Tsarnaev was involved in the September 2011 triple murder that predated the Boston Marathon bombings.
The evidence was disclosed recently by federal prosecutors working on the trial of his brother, Dzhokhar.
Tamerlan Tsarnaev "participated" in a brutal Waltham triple murder that left one of his friends dead, according to newly-filed court records that attribute the information to the Boston Marathon bombing suspect's now-dead friend.
The murders of who is described as Tamerlan's "only American friend" and two other people is brutal. From the Daily Mail.
Law enforcement sources familiar with shooting in May told NBC that Todashev and Tsarnaev carried out the 2011 killings when a drug deal turned violent. The suspects didn't want the three victims to be able to identify them, so they slit their throats.
The bodies were found with marijuana sprinkled on top of them. There was also $5,000 in cash in the room.