His parents are trying to act strong, the source said, but they are very worried.
Todashev was from the Chechnya region, as were the Tsarnaev brothers, the source said.
The source said that the FBI had been investigating Todashev for about a month.
The e-mails, in English and Arabic, contain "both evidence and chit chat, " the source said.
"These arrests should allow for final checks into the Frankfurt network, " the source said.
The investigators were acting on tips, the source said, declining to specify what those were.
The source said Sandusky wrote letters of encouragement over the years to dozens of young people.
There were no casualties and only minor damage at the residence, the source said.
Additional resources are being brought into New York to support the investigation, the source said.
In the images, the source said, one of the men is seen carrying a black backpack.
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The letters were signed, "I am KC and I approve this message, " the source said.
"It may speak volumes about the (level of) planning that went into this, " the source said.
John Glenn of Ohio, the highest-ranking Democrat on the committee, also was present, the source said.
The public believe Harry is a special and gifted young man, the source said.
The source said the French victim had lived in Casamance and was married to a Senegalese woman.
The child stopped breathing, and everyone started screaming, the source said, citing accounts by the young women.
The source said Richardson has always been on Obama's list of possibilities for the key Cabinet position.
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"Answers like that were seen as being meant more to appease us than anything, " the source said.
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By comparison, the source said, the tab for the 2010 conference was only 28% higher than 2008.
It was unclear where Dorner may have gone from there or by what means, the source said.
The source said Hayden has described Musharraf as a key partner in U.S. efforts to combat terrorism.
The government has until Thursday to intervene, not intervene or ask for an extension, the source said.
Authorities have no evidence that he planned to carry out any of the acts, the source said.
The authority might extend the time limits applicable in antitrust investigations to smooth the transition, the source said.
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Santorum agreed to have one soon, but the source said the time and place have not been set.
The photographs are not being released to the public for fear of impeding the investigation, the source said.
CNN: Healing in Boston as investigators seek 2 seen near bombing
"Prince Harry and Prince William are a double act for the rest of their lives, " the source said.
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There appear to be two holdouts, and the judge has ordered jurors to keep deliberating, the source said.
The source said the FDA would also ask apple juice producers to start developing the so-called HACCP Plans.
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