The elder Boston bomb suspect, Tamerlan Tsarnaev died last night in a shootout with police, while 19-year-old Dzhokhar Tsarnaev currently remains in custody.
The FBI has said they will continue their investigation to find out why the suspected bombers allegedly carried out the attack.
Neil Connery reports:
Detectives in Boston are looking further afield as they piece together their case against Marathon suspect Dzohkhar Tsarnaev.
The uncle of Boston bombing suspect Tamerlan Tsarnaev described his recent visit to Dagestan in Russia and his great shock at the attacks.
Both men were enrolled in a school in Dagestan, a neighbouring region that was drawn into Chechnya's violence during the 1990s.