Antisemitism will not be tolerated in Wyoming!

A Casper man who unleashed a string of antisemitic threats against the Anti‑Defamation League (ADL) has been sentenced to federal prison. U.S. Attorney Darin Smith announced that Derek A. Fulfer, 31, will serve 12 months and one day behind bars, followed by two years of supervised release. The sentence was handed down by U.S. District Judge Scott W. Skavdahl on April 3. Fulfer was ordered to self‑surrender to the Bureau of Prisons by June 1, 2026.

Federal prosecutors said Fulfer made four rapid‑fire phone calls on March 5, 2025, to ADL offices located in Colorado and Texas. When no one picked up, he left voicemails packed with antisemitic slurs and explicit threats of violence targeting people of Jewish faith. Staff immediately alerted federal law enforcement.

The FBI quickly launched an investigation, traced the calls back to Fulfer, and confirmed his identity as the voice behind the threats. When questioned by agents, Fulfer admitted making the calls and claimed his threats of violence were protected speech. A federal criminal complaint was filed on August 19, 2025, charging him under 18 U.S.C. § 875(c) — transmitting threats in interstate commerce. Fulfer later waived indictment and pleaded guilty before Judge Skavdahl on January 8, 2026.

U.S. Attorney Darin Smith was unequivocal: 

"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. 

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. 

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." — U.S. Attorney Darin Smith, District of Wyoming