Casper man sentenced for making antisemitic threats to the Anti-Defamation League

A Casper, Wyoming, man was sentenced to 12 months and one day imprisonment with two years of supervised release to follow for making interstate threats.

According to court documents, on March 5, 2025, while working in Cheyenne, Wyoming, Derek A. Fulfer, 31, made four calls in immediate succession to two Anti-Defamation League (ADL) offices out of state. Because his calls were not answered, he left voicemail messages in which he used antisemitic slurs and threatened violence and physical injury against persons of Jewish faith.

"The defendant stated during his interview with the FBI that he had a constitutional right to free speech but let me make it very clear that true threats of violence are not protected by the First Amendment," said U.S. Attorney Darin Smith. "The voicemails he left for the ADL were indeed threatening and caused great concern for ADL employees. This behavior is unacceptable, and we will prosecute these cases to the fullest extent of the law."

A complaint was filed on Aug. 19, 2025, and Fulfer pleaded guilty on Jan. 8, 2026. The FBI investigated the crime. U.S. District Court Judge Scott W. Skavdahl imposed the sentence on April 3 in Casper. The defendant was ordered to self-surrender on June 1, 2026. Case No. 25-CR-00181