The man accused of mentoring one of the marathon bombing suspects lives in Rhode Island.
The New York Review of Books said the man known as "Misha" is Mikhail Allakhverdov. He is 39 years old and lives in West Warwick with his parents.
Allakhverdov told a New York Review blog that he was a convert to Islam and that he knew Tamerlan Tsarnaev, but he denied any part in the bombings.
Allakhverdov said he left Boston three years ago and that he has not had any contact with Tamerlan Tsarnaev since he moved.
He also said he never met any of the suspect's family members who are now accusing him of "radicalizing" Tsarnaev.
"I wasn't his teacher. If I had been his teacher, I would have made sure he never did anything like this," Allakhverdov told the NYR blog.
According to an Associated Press report, U.S. officials said investigators found no evidence that "Misha" had any connection to the Boston Marathon bombing.
Richard Nicholson, an attorney representing Misha's father, told NBC 10 on Monday that "Misha" had been interviewed by the FBI and is cooperating with the investigation.
"To date, they have answered all of the questions that have been asked them by the authorities. They are fully cooperating," Nicholson said.
Tamerlan Tsarnaev was killed in a shootout with police. His brother, Dzhokhar Tsarnaev, is in federal custody. Tamerlan Tsarnaev was married to a woman from North Kingstown.
Neighbors who live in the same West Warwick apartment building as Allakhverdov and his parents were shocked to learn of the connection.
"Like I said, it's scary to have somebody living here that knows this guy," one neighbor said.
Nicholson wouldn't comment on any connection to Tamerlan Tsarnaev except to say the family is eager to put the event behind them.
"As soon as this ordeal is over, they'll be better off," he said.