Todashev, a suspect in the case, lived with Matanov at the time of the murders, according to FBI reports, and later moved to Florida. This May Todashev was killed in his Orlando home by an FBI agent after he allegedly attacked the officer. The FBI says Todashev was on the verge of signing a statement that implicated himself and Tamerlan Tsarnaev in the triple murder. The same month, ABC News reported investigators had developed “mounting evidence,” bolstered by “forensic hits,” that pointed to the possible involvement of the Tsarnaev brothers in the grisly unsolved murders.
Matanov's immigration attorney, Paul Glickman, said that his client was cooperative with the FBI during multiple interrogations over the past year and answered all of the bureau's questions about the night of the Waltham murders.
"Mr. Matanov was cooperative multiple times," Glickman told ABC News. "I have no idea why he has been arrested now."
Glickman refused to comment on the specifics of his client's interviews with the FBI, including at least one that took place at his Boston office, according to the reports.
Matanov and Todashev have not been implicated in the Boston bombing, but Matanov did have dinner with the Tsarnaev brothers the day of the Boston bombing and texted Tamerlan roughly 40 minutes after the deadly blasts, prosecutors said. He was also in touch with Todashev in Florida after the attack, the report states.
Edward Hayden, who represents Matanov on the current obstruction charges said his client is a hardworking immigrant with dreams of bringing his family to the United States, not a radical.
"Being friends with someone is not an indication of terrorist activities," he said. The FBI report obtained by ABC News notes that Matanov told investigators he consciously avoided discussing extremism with the Tsarnaevs.
The Islamic Society of Boston said too that terrorism is are not in line with the mosque’s values. Vali pointed out that mosque leaders volunteered to try and negotiate with Dzhokhar Tsarnaev, the accused bomber who survived the police shootout that took his older brother’s life and who was on the run for hours before being captured.
“Since the bombing what we are intentionally trying to do at that Cambridge center is to push the right vision of Islam, in a stronger way… contributing positively to our community,’’ Vali said. “That’s what we are about.”
Michele McPhee is a freelance journalist and frequent ABC News contributor based in Boston.