Tamerlan Tsarnaev

A blood-stained message prosecutors say Boston Marathon bomber Dzhokhar Tsarnaev wrote on the inside of a boat. The undated photo was presented as evidence to jurors at Tsarnaev's trial in Boston.

The man who escaped the Tsarnaev brothers takes the stand in Boston

Jurors in the Boston Marathon bombing trial heard testimony on Friday from Dun Meng, who made a dramatic escape after his car was hijacked by bombing suspect Tamerlan Tsarnaev.

The man who escaped the Tsarnaev brothers takes the stand in Boston
Boston Marathon bombing survivor Marc Fucarile leaves the federal courthouse in Boston on the first day of the trial of accused Boston Marathon bomber Dzhokhar Tsarnaev on March 4, 2015.

Everyone says Dzhokhar Tsarnaev bombed the Boston Marathon — even his own lawyers

Everyone says Dzhokhar Tsarnaev bombed the Boston Marathon — even his own lawyers
Aftermath of the Boston marathon bombing

Solving a triple murder case might have prevented the Boston Marathon bombings

Solving a triple murder case might have prevented the Boston Marathon bombings
NSA and Santa cartoon

So just where will the NSA stop?

So just where will the NSA stop?

Was alleged Boston bomber Tamerlan Tsarnaev mentally ill?

Was alleged Boston bomber Tamerlan Tsarnaev mentally ill?

The Unanswered Questions in the Boston Marathon Bombings' Case

Juliette Kayyem, foreign affairs columnist for the Boston Globe, and a former homeland security official, says there are many unanswered questions in the case.

The Unanswered Questions in the Boston Marathon Bombings' Case

Massachusetts Governor Deval Patrick on the Boston Marathon Attack and Investigation

Massachusetts Governor Deval Patrick on the Boston Marathon Attack and Investigation

Question of Burying Boston Marathon Suspect Elicits Passionate Responses

Question of Burying Boston Marathon Suspect Elicits Passionate Responses

Boston Bombing Suspect Tamerlan Tsarnaev Rejected for Burial in Cambridge, Massachusetts

Tamerlan Tsarnaev's body awaits burial but the family is having trouble finding an Islamic center to conduct the last rites. Marco Werman speaks with Shahina Siddiqui, president of the Islamic Social Services Association in Canada about what's involved.

Boston Bombing Suspect Tamerlan Tsarnaev Rejected for Burial in Cambridge, Massachusetts

Canadian Jihadist Linked to Accused Boston Bomber

William Plotnikov was a Russian Canadian who converted to Islam and joined an insurgency in the republic of Dagestan. Plotnikov was killed last year in a raid.He may have been in contact with deceased Boston Marathon bombings suspect Tamerlan Tsarnaev.

Canadian Jihadist Linked to Accused Boston Bomber

Man named as radicalizing Boston Marathon attack suspect speaks out

Mikhail Allakhverdov is the man called Misha, who members of the Tsarnaev family say must have been responsible for radicalizing their sons, before they launched their attack on the Boston Marathon. But in an interview recently, he denied having anything to do with that.

Man named as radicalizing Boston Marathon attack suspect speaks out

Boston Bombing: Was There an Intelligence System Failure?

Boston Bombing: Was There an Intelligence System Failure?

Suspected Boston Bomber was on Terrorist Databases

US officials tell news outlets that Tamerlan Tsarnaev had been on two databases of potential terrorists for at least 18 months prior to the Marathon bombings.

Suspected Boston Bomber was on Terrorist Databases

An Eerie Walk Through the Tsarnaev's Boston Area Neighborhood

Laure Mandeville is now chief US correspondent for the Le Figaro. She came to Boston over the weekend to speak with members of the Chechen community here, and to friends and neighbors of Boston bombing suspects Dzhokhar and Tamerlan Tsarnaev.

An Eerie Walk Through the Tsarnaev's Boston Area Neighborhood

What Was Boston Bombings Suspect Tamerlan Tsarnaev Doing in Dagestan?

Whether Boston bombing suspect Tamerlan Tsarnaev reached out to insurgents during his six-month stay in the Caucasus region last year is a key question for US investigators right now.

What Was Boston Bombings Suspect Tamerlan Tsarnaev Doing in Dagestan?