"A thirty-nine-year-old man of Armenian-Ukrainian descent, Allakhverdov is of medium height and has a thin, reddish-blond beard," Caryl wrote. "When I arrived he was wearing a green and white short-sleeve football jersey and pajama pants. Along with his parents, his American girlfriend was there, and we sat together in a tiny living room that abuts the family kitchen."

He added, "In many ways, Allakhverdov's parents seem typical former-Soviet émigrés who had embraced middle class life in the United States. His father is an Armenian Christian and his mother is an ethnic Ukrainian."

In the article, Allakhverdov's father is quoted as saying, "We love this country. We never expected anything like this to happen to us."

Ruslan Tsarni, Tamerlan's uncle, told CNN last week that a friend of his nephew "just took his brain. He just brainwashed him completely."

After The Associated Press said members of Tsarnaev's family identified the friend as Misha, Tsarnaev's former brother-in-law told CNN that Tsarnaev had a friend by that name. Elmirza Khozhgov said the friend apparently "had influence on Tamerlan." But Khozhgov said he did not see Misha try to radicalize Tsarnaev.

Death-penalty expert to defend bomb suspect

Tamerlan Tsarnaev, 26, died after a shootout with police. His younger brother, Dzhokhar, 19, sustained gunshot wounds and is being held at a prison medical facility west of Boston. He has been charged with using and conspiring to use a weapon of mass destruction resulting in death, as well as one count of malicious destruction of property by means of an explosive device resulting in death.

On Monday, a federal judge appointed prominent defense lawyer Judy Clarke to represent the wounded suspect, who could be sentenced to death if convicted.

Legal colleagues consider Clarke to be the nation's foremost expert on defending federal capital cases. She has represented numerous high-profile clients facing Death Row, including Ted Kaczynski, the Unabomber; Eric Rudolph, who admitted to the 1996 Atlanta Olympic bombing and other attacks; and Jared Lee Loughner, who pleaded guilty to killing six people and wounding 13, including then-U.S. Rep. Gabrielle Giffords, in a Tucson, Arizona, shooting spree. All of them are serving life in prison.

FBI enters suspect's widow's family home

Investigators moved forward on another front in Rhode Island, searching the family home of Tamerlan Tsarnaev's widow, Katherine Russell, for about 90 minutes on Monday.

Russell and her toddler daughter -- Tamerlan's child -- have been staying at the North Kingstown home with her parents. Her attorneys were present during the search.

Agents left the home with items that included a black case and a clear plastic bag identified as DNA samples.

A law enforcement official warned that even if Russell's DNA matches the female DNA on the pressure cooker, that does not necessarily prove she had anything to do with the preparation of the bomb. She -- or any other female -- might have come into contact with the cooker in the past.

Russell has said she was completely in the dark about her husband's alleged plan. Her attorney said the news "came as an absolute shock."

The two were married on June 21, 2010.

The double bombing near the finish line of the Boston Marathon killed three people and wounded more than 260. Twenty-three remained hospitalized on Monday. At least 14 people have needed amputations, according to medical officials.

Investigators searched a landfill in New Bedford, Massachusetts, in hopes of finding a laptop that could be relevant to the case. But the two-day effort ended without success, a U.S. law enforcement official told CNN Monday.

The FBI was following leads from Dzhokhar and others that his laptop was thrown in a dumpster and then picked up for disposal at a landfill.

The laptop might not be crucial to the investigation, the official added.