In 2011, three men were found murdered in a Boston apartment. For some reason, Reuters avoids mentioning the date of the murders. It was September 12, 2011. The slain included Brendan Mess, who was best friends with Tamerlan Tsarnaev.

Authorities are investigating whether the Boston Marathon bombing suspect who died after a shootout with police had any connection to an unsolved triple homicide in suburban Boston in 2011, a spokeswoman for prosecutors said on Monday.

The 26-year-old Tamerlan Tsarnaev, identified by the FBI as one of two brothers suspected in last Monday’s blasts, was a close friend of one of three men who were stabbed in the neck in an apartment in Waltham, Massachusetts in September, 2011.

At the time, the Middlesex County District Attorney’s office said it appeared that the victims knew their assailant or assailants and that the attacks were not random.

The men were found slain by being stabbed in the neck with a sharp object like an ice pick, and covered with marijuana. About $5000 in cash was also reportedly found in the apartment, indicating that robbery wasn’t the motive and it wasn’t a drug gang hit. There was no sign of forced entry, leading investigators to believe that the victims knew the killer. Despite the fact that the elder bomber was best friends with Mess, Tsarnaev did not go to the funeral. The younger bomber was known to smoke pot with his friends.