Not only the FBI but the national guard also along with his mental health providers, but that's all confidential so it will take time to investigate the facts as to what his true motive is.
 By the looks of it I would say that the FIB is now taking him very serious. He wanted their attention and he has it now. Heartbreaking that he felt he was being forced to do this and nobody that he went to for help were of any affect basically they were all useless. With SO MANY RED FLAGS how did they miss them?