A friend of Boston Marathon bombing suspect Dzhokhar Tsarnaev is believed to have provided the handgun used to kill a Massachusetts Institute of Technology police officer during the manhunt.

A college friend was convicted of trying to protect Boston Marathon bombing suspect Dzhokhar Tsarnaev by agreeing with another friend to get rid of items they took from his room three days after the attack.

Two friends of Boston Marathon bombing suspect Dzhokhar Tsarnaev pleaded not guilty in federal court to charges of conspiracy to obstruct justice and obstructing justice with intent to impede authorities.

Former teachers of one of the students from Kazakhstan arrested in connection with the Boston Marathon bombings have described him as an easygoing teenager who distinguished himself mainly by his failing grades in maths and science.

Three men who attended college with the Boston Marathon bombs suspect have been charged in connection with the case.