He made some of the threats using his own name and others implicating a former girlfriend as part of an effort to intimidate her. Authorities made a federal complaint unsealed on Friday in Federal District Court in Manhattan. The accusations against Mr. Thompson were announced on Friday by Preet Bharara, the United States attorney in Manhattan; William F. Sweeney Jr., head of the F.B.I.’s New York office; and James P. O’Neill, the New York police commissioner. On Feb. 1 Thompson claimed he had placed two bombs in Aschool in Farmington Hills, Mich. The website The Intercept confirmed in a statement on Friday that Mr. Thompson worked for the publication for a little more than a year, until he was fired in January 2016 after it was discovered that he had fabricated sources and quotes in his articles .Hower, Mr. Thompson is not believed to be responsible for most of the threats against Jewish centers around the country. Investigators are still trying to identify who is responsible for those threats.