A man charged with possessing the gun authorities believe the Boston Marathon bombing suspects used to kill an MIT police officer is expected to change his plea in court later this week.
Stephen Silva, of Cambridge, pleaded innocent after he was charged in July with heroin trafficking and possession of a handgun with an obliterated serial number.
An electronic notice filed Monday said a change-of-plea hearing is scheduled for Silva Friday in U.S. District Court.
Silva's lawyer did not immediately return a call seeking comment.
The 21-year-old Silva was a friend of marathon bombing suspect Dzhokhar Tsarnaev. Silva's lawyer confirmed earlier that the handgun is the same gun authorities believe Tsarnaev and his older brother used to kill MIT police officer Sean Collier several days after the marathon bombings while authorities were looking for the Tsarnaevs.