most likely you are correct.
in fact, the mother of the suspects just stated the FBI was in contact with her family for years, and that they were "controlling" her eldest son. perhaps this is why the FBI had to finally admit they were in contact with the brothers years ago, after all the footage surfaced of unidentified military contractors standing feet away from the blast site, then subsequently photographed working with the FBI during the cleanup process. they were at the very least, clearly tracking him.
www.youtube.com/watch?&v=ARE9rclZCqw
He was controlled by the FBI, like for three, five years, she told Russia Today during an interview. They knew what my son was doing, they knew what actions and what sites on the Internet he was going [to], they used to come
and talk to me
they were telling me that he was really a serious leader and they were afraid of him.
How could this happen?
They were controlling every step of him, and they are telling today that this is a terrorist attack, she added.