Immigration authorities revoked the J‑1 visa of a Harvard Law School visiting professor, Carlos Portugal Gouvea, after prosecutors said he fired a BB gun outside a Brookline synagogue on Yom Kippur. The Department of State moved to revoke his visa and DHS described the episode as an "anti‑Semitic shooting incident;" Gouvea accepted a plea deal and agreed to voluntarily leave the U.S. Harvard placed Gouvea on administrative leave; university and federal actions highlight how criminal conduct by visiting academics can trigger immediate visa and employment consequences. Campus leaders and international programs offices are reviewing screening and oversight practices for short‑term scholars and the reputational and safety implications on nearby communities.