The surviving Boston bomber Dzhokhar Tsarnaev has every incentive for insisting that he and his brother acted alone and out of “ideological” motives in the Boston Marathon bombings of April 15.
That was predictable.

What is surprising is the acceptance of this claim by his federal interrogators.

He can’t speak because of a wound to the throat. But did they really expect him to write down the names and addresses of his and his brother Tamerlan’s fellow terrorists and associates?

Dzhokhar was formally charged Monday, April 22, with using and conspiring to use a weapon of mass destruction. The charge related to the twin bombings of the Boston Marathon causing the deaths of three people including an 8-year old boy and injuring 180 others.

One way or another, the 19-year old Dzhokhtar is condemned to die – whether under a federal court sentence or from his injuries.

If he sticks to his story that the brothers acted alone in the cause of Islam, he dies a “a glorious martyr” to the sacred cause, celebrated across the radical Islamic world as a shining inspiration for more terrorist cells to go forth bearing his name.

Politicians are not the only ones who care about their legacies. To achieve this he must refrain from spilling the beans and lead the FBI inquiry up a blind alley.

DEBKA’s counter-terrorism sources say the investigation’s best bet would be to finally follow up on the treasure trove the Federal Security Service of the Russian Federation – the FBS - relayed to Washington in 2011. They not only fingered Tamerlan, who died in a shootout with the Boston police, as a “suspect Islamist terrorist” but revealed that he had toured radical Islamic mosques in Dagestan and Chechnya in search of contacts in jihadist terror groups. The Russians also appended a whole list of terrorist suspects of Caucasian descent in the Boston area.

Also worth following up is Barack Obama’s call to Russian President Vladimir Putin on April 19 to thank him for Moscow’s cooperation n the marathon bombing investigation

What was that about? What made Russian assistance valuable enough for the two presidents to agree on better cooperation between the FBI and the FBS?

And the content of a second conversation that took place at the height of the search for the Boston bombers would be highly relevant too. On April 17, Saudi Foreign Minister Prince Saud al-Faisal arrived unannounced at the White House and was immediately received by President Obama. Our sources report that he too handed a high-value dossier from confidential files in Riyadh containing data on clandestine Saudi terrorist cells in the Boston area.

By digging into an unsolved two-year old triple murder, the Boston Globe lifted a corner of the veil on the Tsarnaev brothers’ violent past in the service of radical Islam. The Boston police consequently reopened the case this week and are looking at Tamerlan for the murder of three young Jews found with slashed throats in a Waltham, Massachusetts apartment on Sept. 11, 2011. Brendan Mess was Tamerlan’s close friend, Erik Weissman, a Brandeis University graduate and Raphael Teken a devout Jew.

Look again at the date: The murders took place on the 10th anniversary of 9/11.