Washington Post | R Saldanha/Reuters
Homeland Security Investigations, an arm of U.S. Immigration and Customs Enforcement that investigates transnational crime, took the lead. HSI researched the protesters and referred dozens of cases to the State Department, sometimes citing an obscure statute for revoking visas…. The HSI tiger team ultimately generated between 100 to 200 reports on protesters, Hatch said, with many of the names coming from Canary Mission. Some came from Betar US, a militant Zionist organization that the Anti-Defamation League considers an extremist group.