Upon questioning by U.S. Rep. Louie Gohmert, FBI Director Robert Mueller admitted that the FBI did not investigate the ideology of the founders of the mosque where the Boston bombers were radicalized, even after they were tipped off by the Russians that the older of the brothers, Tamerlan, was a security risk. Although Mueller says that the FBI was in the Tsarnaev brothers' mosque before the bombing, he said it was as part of the FBI's "outreach efforts."
If the FBI would have investigated the Islamic Society of Boston, they would have found that the mosque was founded by Abdulrahman Alamoudi, who also served as its first president. Alamoudi, a former advisor to President Clinton, is now in prison for terror financing al-Qaeda.
In addition, the mosque was attended by Pakistani Aafia Siddiqui, an Ph.D. neuroscience student from MIT and Brandeis, now serving an 86-year-sentence for plotting a terrorist attack in New York City; Tarek Mehanna, a pharmacist now serving 17 years in prison for conspiring to aid al-Qaida; and Ahmad Abousamra, a Massachusetts resident who is wanted by the FBI for travelling overseas to Pakistan and Yemen to be trained in how to kill American servicemen overseas.
According to the Investor's Business Daily, surveillance at mosques have been off-limits to FBI agents since October 2011 due to pressure from Islamist front groups and civil liberties groups. In addition, undercover sting operations – which have prevented many terrorist attacks in the past – now require approval from a special oversight body at the Justice Department, the Sensitive Operations Review Committee. All members of this committee are kept secret.