HSI Special Agents arrest individual during Project Shadowfire. One thousand one hundred and thirty-three individuals were arrested across the U.S. during Project Shadowfire, a 5-week operation led by U.S. Immigration and Customs Enforcement’s (ICE) Homeland Security Investigations (HSI) that ended March 18. The operation targeted transnational criminal gangs and others associated with transnational criminal activity, like drug trafficking, human smuggling and sex trafficking, murder and racketeering.