A Casper man, Derek A. Fulfer, was sentenced on April 3 to 12 months and one day in federal prison for making antisemitic threats against the Anti-Defamation League, according to U.S. Attorney Darin Smith. Fulfer, age 31, will also serve two years of supervised release following his prison term and has been ordered to self-surrender to the Bureau of Prisons by June 1.
The case centers on four phone calls made by Fulfer on March 5, 2025, to ADL offices in Colorado and Texas. When no one answered the calls, he left voicemails containing antisemitic slurs and explicit threats of violence targeting Jewish individuals. Staff at the ADL reported the incident immediately to federal law enforcement.
Federal investigators traced the calls back to Fulfer and confirmed his identity as the caller. During questioning by FBI agents, Fulfer admitted making the threatening calls but claimed his statements were protected speech. He was charged under federal law with transmitting threats in interstate commerce after a criminal complaint was filed on August 19, 2025. He later waived indictment and pleaded guilty before U.S. District Judge Scott W. Skavdahl on January 8.
U.S. Attorney Darin Smith addressed the seriousness of these actions in a statement: “Jewish Americans have every right — not as a courtesy, not as a privilege, but as Americans — to live, to worship, and to serve their communities free from threats of violence.” Smith continued: “Let there be no confusion about what happened here. This was not political commentary. This was not satire. This was not protected speech. This was a calculated attempt to terrorize people because of their faith. And it failed.” He concluded with: “To those who would threaten the Jewish community — or any community of faith — in Wyoming or anywhere else in this country: we see you, we will find you, and we will prosecute you to the fullest extent of federal law.
Not on my watch. Not in this district. Not in America.”
