U.S. Immigration and Customs Enforcement’s (ICE) Homeland Security Investigations (HSI) investigates criminal threats facing the United States with expertise and effectiveness. The threats presented by criminals have far-reaching consequences. In response, HSI uses a versatile approach to conduct its operations so that it can achieve the best results for the nation and its people. In 2018, HSI continued its fight to combat transnational criminal organizations, prevent the sale and use of opioids and fentanyl and prosecute businesses not in compliance with federal employment laws. Below is a breakdown of three of the primary investigation categories HSI focused on the last 12 months.