Report: 'Mounting evidence' Tsarnaev brothers have killed before

A new report suggests that Tamerlan and Dzhokhar Tsarnaev, alleged Boston Marathon bombers, may have more of a murderous past than we knew...

(AP) 

Via ABC News:

Massachusetts investigators have developed what they call "mounting evidence," bolstered by "forensic hits," that point to the possible involvement of both Tamerlan Tsarnaev and his younger brother Dzhokhar in a gruesome, unsolved triple homicide in 2011, law enforcement officials told ABC News.

The officials cautioned that until more definitive DNA testing is complete, it is still too early to consider bringing an indictment against the younger of the two brothers, who officials said has admitted his role in the Boston Marathon bombings that killed three and injured 260 more on April 15. Tamerlan was killed in a shootout with police days after the Marathon bombing attack, but Dhzokhar survived and was captured. [...]

Now law enforcement officials tell ABC News that some crime scene forensic evidence provided a match to the two Tsarnaev brothers. The officials also said records of cell phones used by the Tsarnaevs appears to put them in the area of the murders on that date. Several officials confirmed the new findings but declined to be identified because they are not authorized to comment on the ongoing investigation.