Tamerlan Tsarnaev

Ibragim Todashev told FBI agents that he and Tamerlan had participated in robbing three men in Waltham and that Tamerlan had killed them. The FBI used those statements alongside other evidence to obtain a search warrant.

Attribution

Directly implicated

Federal authorities and rulings in Dzhokhar's trial attribute to Tamerlan, together with his brother, the placement and detonation of the two marathon bombs, killing three people and injuring hundreds.

State of the evidence

Documented

Attribution

Directly implicated

Authorities attributed the murder of police officer Sean Collier and the attempted theft of his weapon during their flight to the Tsarnaev brothers.

State of the evidence

Documented

Attribution

Shared responsibility

Together with Dzhokhar, Tamerlan was implicated in the carjacking of a vehicle, temporary unlawful confinement of its driver and theft of 800 dollars.

State of the evidence

Documented

Attribution

Shared responsibility

Tamerlan participated in the armed confrontation with police in Watertown. During the escape, Dzhokhar drove the vehicle towards officers and ran over Tamerlan, who died of injuries sustained at the scene.

State of the evidence

Documented

Attribution

Directly implicated

Tamerlan travelled to Russia and reportedly stayed in Dagestan. US systems had generated travel notifications, some of which were not shared or processed as expected.

State of the evidence

Documented

Russian intelligence services sent the FBI information expressing concerns about Tamerlan and Islamist radicalisation. The FBI interviewed him and family members and carried out checks.

State of the evidence

Documented

Attribution

Directly implicated

Cambridge police arrested Tamerlan after his partner called, stating that he had struck her. According to the report cited by ABC, he admitted to police that he had slapped her.

Attribution

Directly implicated

Course of the proceedings

1. Formally charged — Formal charge before the current outcome