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Cambridge man arrested in possible connection to aiding marathon bombers

Federal authorities recently arrested the man believed to have provided the gun allegedly used to slay MITPD Officer Sean Collier. The origin of the gun that the alleged killers used was previously unknown.

Stephen Silva was arrested last month and appeared in federal court on multiple charges, including possession of a handgun that had its serial number removed in February 2013, two months before the marathon bombings.

The gun mentioned in the indictment, a Ruger model P95 9mm pistol, is the same type of gun used to kill Officer Collier. WFXT cited two unnamed sources who told them that authorities had linked the gun to the killing of Collier. A spokeswoman from the US Attorney’s office declined to confirm the connection.

Silva attended the same high school as the Boston Marathon bombing suspect Dzhokhar Tsarnaev and was good friends with him, according to one of Silva’s neighbors.

—Shenghao Wang