That is what the FBI is saying although they are not going into much detail:
The mother of the Boston Marathon bombing suspects is a “person of interest” to federal authorities seeking to learn who radicalized one or both of her sons, according to lawmakers, and a separate report said she was on a federal terrorism database some 18 months before the attack.
Zubeidat Tsarnaeva, who had reportedly become more militant in her Muslim faith around the same time as her son, Tamerlan Tsarnaev, was added to the classified intelligence database known by the acronym TIDE at the CIA’s request. Two key lawmakers said authorities now want to know if she helped put her son, who died a week ago following a shootout with police in Massachusetts, on the road to radicalism.
“She is a person of interest that we’re looking at to see if she helped radicalize her son, or had contacts with other people or other terrorist groups,” Rep. Dutch Ruppersberger, D-Md., the top Democrat on the House Intelligence Committee, told reporters.
Rep. Michael McCaul, R-Texas, who chairs the House Homeland Security Committee, also pointed to Zubeidat as someone who may have led Tamerlan down the path toward Islamic extremism.
“The mother in my judgment has a role in his radicalization process in terms of her influence over him (and) fundamental views of Islam,” McCaul said.
And what, exactly, is this database?
The Terrorist Identities Datamart Environment database contains between 500,000 and 1 million names of people on the radar of various national security agencies, but a person’s presence on the list does not automatically mean he or she is suspected of terrorist activity and does not automatically subject them to surveillance, security screening or travel restrictions.
It does not seem that there is much to go off here — and whatever is going on is being kept quite secret. It seems that people are just saying stuff.
Everyone wants answers so that some people are trying to give answers even though there appears to be nothing clear.
The rest of the article was rather disappointing.
Sometimes, reading the media — I mean, really reading and gleaning over the stories on the internet, is a hard task that yields little fruit.