A tenure-track professor at the University of Oklahoma was detained by Immigration and Customs Enforcement while en route to an academic conference and held for several days before release, university colleagues said. The professor, reported to be on an H‑1B visa, was later released; university and scholarly associations expressed alarm about the arrest. Colleagues and academic groups warned the incident heightens uncertainty for foreign-born scholars and may chill conference travel, collaboration, and visiting appointments. The Department of Homeland Security described the detention as part of standard questioning; the episode has prompted calls for clearer guidance and safeguards to protect lawful academic travel and research exchange.