In early 2017, the Federal Bureau of Investigation (FBI) closed its investigation of the matter. The FBI identified four men who sent threats and obtained confessions from two of them, one of whom stated that they had sent the threat as a "joke" but "understood that it was a federal crime to send a threatening communication to anyone and will never do it again". The U.S. Attorney for the District of Massachusetts declined to prosecute, giving no specific reason. Reacting to the report, Wu stated the FBI did not care about the investigation and that she was "livid". In the wake of the 2019 Poway synagogue shooting, however, she said that the FBI needs dedicated agents who understand online culture (8chan in particular).