Fentanyl Seizures Plunge 39% as Agents Get Pulled Into Immigration Duty

Fentanyl seizures dropped 39% during the first year of the second Trump administration, according to a newly released federal audit that traces the decline to a dramatic reshuffling of agents away from drug investigations and toward immigration enforcement. At one Homeland Security Investigations office, a drug team that once had seven agents was reduced to about three, while another office funneled nearly 99% of its work into immigration cases instead.

The findings come from the Department of Homeland Security Office of Inspector General, which published audit report OIG-26-23, titled “ICE Homeland Security Investigations Hindered in Countering Fentanyl Entering the United States,” as reported by the Baltimore Sun. Homeland Security Investigations, a subagency of ICE, plays a key role in countering fentanyl smuggling by targeting trafficking routes and laboratories, but inspectors found that role has been squeezed as the agency's criminal investigations arm was shifted toward immigration enforcement. Fentanyl is a highly addictive synthetic opioid and remains the main driver of overdose deaths in the United States, the audit notes.

Hours Diverted, Investigations Stalled

Immigration enforcement work increased more than 800% across investigative categories and consumed over 1.7 million additional hours in fiscal 2025, according to the audit. HSI agents reported that an all-hands-on-deck environment toward immigration enforcement began in January 2025. Meanwhile, fentanyl investigations declined 31% in fiscal 2025 compared with the prior year, shedding more than 250,000 investigative hours in the process.

Inspectors interviewed more than 100 agents across 11 HSI field offices for the review. At least one office reported having almost no capacity left for fentanyl investigations at all. The audit also pointed to technology limitations that hampered agents during fentanyl casework, adding a technical obstacle on top of the staffing strain.

A Recent Fix, and Old Friction With Other Agencies

Some of the bureaucratic hurdles behind the decline predate the staffing shift. For years, HSI lacked independent authority to investigate fentanyl-related offenses and had to rely on the Drug Enforcement Administration for case-by-case approval, a bottleneck that a memorandum from the U.S. Attorney General's office resolved on May 26, 2026, when it granted HSI special agents direct Title 21 authority to enforce the Controlled Substances Act, according to the DHS Office of Inspector General. Fentanyl investigations were also hindered by delays in obtaining funds needed to purchase information and evidence, the same audit found.

Referrals from U.S. Customs and Border Protection posed another persistent problem. Special agents in 5 of the 11 surveyed HSI field offices reported that CBP officers frequently failed to refer border fentanyl seizures to HSI for criminal investigation, leaving what the audit describes as low and inconsistent case flow between the two DHS components. Separately, the agency's custom-built drug analytics technology tools were decommissioned three years after launch due to low user adoption and severe technical limitations, despite millions of dollars invested in their development.

Watchdog Recommends Staffing Review, ICE Sets 2027 Target

The inspector general recommended that HSI review its staffing levels to ensure appropriate coverage for fentanyl investigations. ICE agreed with the report's recommendations and said Homeland Security Investigations will review staffing levels and determine and implement next steps as needed, with the agency estimating that recommendation would be completed by June 2027.

The White House Points to Falling Overdose Deaths

The administration has offered a competing interpretation of the seizure numbers. In statements released for National Fentanyl Prevention and Awareness Day on August 21, the Department of Homeland Security argued that a 45% decrease in nationwide fentanyl seizures in fiscal year 2025 reflects successful supply-chain deterrence in Mexico rather than weakened enforcement, according to DHS. President Trump signed an executive order in December 2025 formally classifying illicit fentanyl as a weapon of mass destruction to unlock expanded federal counter-narcotics powers, according to a report reviewed by InvestorsHub.

Provisional data published in May by the Centers for Disease Control and Prevention lends some support to that argument on the public health side: synthetic opioid overdose deaths, primarily driven by fentanyl, fell 22.1% in 2025, dropping from 48,913 deaths in 2024 to 38,084. Total drug overdose fatalities nationwide fell 13.9% in 2025 to an estimated 69,973, marking the third consecutive year of national overdose reductions, the CDC reported.

Whether that decline reflects genuinely reduced drug availability, as the administration contends, or gaps in the enforcement pipeline documented by the inspector general, remains an open question the audit does not resolve. A September 2025 report from the U.S. Government Accountability Office had already found that DHS lacked a statutorily required performance management system to measure the actual effectiveness of its multi-agency fentanyl interdiction efforts, a gap that predates the current staffing shift and leaves the competing seizure narratives difficult to definitively adjudicate.

Separately, federal border data analyzed in a July 2025 report by the American Immigration Council found that U.S. citizens, rather than foreign nationals, accounted for 81.2% of drug seizures at southwest land border crossings between fiscal year 2019 and mid-2024, a detail cited in a prior fentanyl bust at San Ysidro. HSI, for its part, continues to collaborate with other law enforcement agencies to investigate smuggling operations even as its own agents describe an environment reshaped by the demands of immigration enforcement.