The US Department of Homeland Security (DHS) on Monday, 12 October 2026, disclosed that authorities across New York had declined to honour 16,070 immigration detainer requests since President Donald Trump returned to office — a data release that sharply escalated the federal government's ongoing dispute with the state's Democratic leadership.

What the Figures Show

According to DHS, the 16,070 unhonoured detainer requests were recorded between 20 January 2025 and 8 October 2026 — a span of nearly 21 months. The department associated those declined requests with 52,503 criminal charges and convictions combined, a figure that covers both charges and convictions and should not be read as a count of convicted offenders alone.

Among the categories cited by DHS were 131 homicide-related charges or convictions, 132 involving kidnapping, and 1,017 involving sexual offences. The department also listed 1,561 driving-under-the-influence cases, 1,631 burglaries, 1,776 robberies, 2,198 weapons offences, 4,324 drug offences, and 9,502 assaults.

Notably, the figures are cumulative over the 21-month period. They do not represent detainers issued solely on Monday, nor do they establish that the associated offences were committed after individuals were released following a declined detainer.

What the Federal Government Said

Homeland Security Secretary Markwayne Mullin used the announcement to directly criticise New York City Mayor Zohran Mamdani and Governor Kathy Hochul, accusing both of obstructing federal immigration enforcement. 'We enforce these laws with no help from Mayor Mamdani and Governor Hochul,' Mullin said in the department's release. He added that federal officers would continue making arrests despite opposition from state and local political leaders.

DHS also linked the announcement to an Immigration and Customs Enforcement (ICE) shooting incident in New York City the previous week, alleging that a man had used his vehicle against immigration officers and that an officer fired in self-defence. That account represents the department's own description of the incident.

New York's Position

Mayor Mamdani had defended the city's approach at a February 2026 briefing, stating 'these are policies that keep New Yorkers safe.' He said his executive order partly restated existing requirements for judicial warrants before ICE agents could enter city properties such as schools or hospitals. Those remarks preceded Monday's data release and were not issued as a direct response to it.

An immigration detainer, as described in ICE's published guidance, is a request that a law-enforcement agency notify federal authorities before releasing a person and maintain custody for up to 48 hours beyond the otherwise scheduled release. Detainers are characterised by ICE as requests — not binding legal orders — connected to its intention to assume custody for immigration enforcement purposes.

Broader Context and What It Means

The release of these figures marks a continuation of the broader standoff between the Trump administration and Democratic-led sanctuary jurisdictions. This comes amid sustained federal pressure on cities and states that limit cooperation with immigration enforcement, a pattern that has intensified since January 2025. Monday's announcement did not introduce a new immigration rule, announce a court ruling on the disputed policies, or alter the legal status of detainer requests — it was, in substance, a release of cumulative enforcement data paired with political criticism.

The dispute between Washington and Albany shows no sign of resolution, and the figures are likely to become a flashpoint in the lead-up to future federal funding negotiations with New York.