Immigration and Customs Enforcement (ICE) doesn’t have all the legal means or authority to do so. ICE is the primary investigative branch of the Department of Homeland Security. ICE drug-focused investigations led to “seizures of 241,967 pounds of cocaine, 4,331 pounds of heroin, 2,731 pounds of methamphetamine and 1.3 million pounds of marijuana” The DEA has limited it to only 1400 out of 6,200 special agents, but ICE agents have always been considered law enforcement.”]
Source: https://www.csoonline.com/article/2123915/dhs–drug-interdiction-and-common-sense.html