Mexico's Foreign Ministry Sends Cease-and-Desist Letters to ICE Detention Operators, Files Criminal Complaints Over 17 Deaths

Since Mexico announced its legal campaign against ICE, the country's Foreign Relations Secretariat has moved to put actual paperwork behind the threat.

Top Mexican diplomat Roberto Velasco Alvarez outlined the specifics at a news conference, according to Breitbart News. The plan has three tracks: criminal complaints filed through the U.S. Department of Justice and state attorneys general offices, civil litigation against the private companies that operate ICE detention centers, and a lobbying push targeting members of Congress.

The criminal complaints cover the deaths of 17 Mexican nationals who died either in ICE custody or during immigration operations in 2025 and 2026. Velasco framed the goal plainly: "We are moving beyond diplomatic matters to file complaints requesting that the cases be investigated in the penal field."

The civil track starts with cease-and-desist letters. Mexico's SRE will send those letters to the private detention operators first, formally demanding changes to the conditions that it says contributed to those deaths. If the companies ignore the letters, civil suits follow.

The Houston Shooting That Accelerated the Timeline

The immediate trigger for Sheinbaum's escalation order was the shooting of Lorenzo Salgado Araujo in Houston. According to Breitbart News, federal agents shot Salgado after he allegedly used his vehicle to ram a police vehicle and then attempted to run over an ICE agent during an apprehension operation. Sheinbaum's public position, as reported by Breitbart Texas, was that "the only thing that Salgado did wrong was not having legal status."

That framing is contested. A separate AP News report noted that a lawmaker said Salgado was not even the original target of the operation, a detail Mexico has not acknowledged in its public statements. The two facts are not mutually exclusive: he could both have not been the target and have rammed a police vehicle.

The Strongest Case for Mexico's Position

Critics of U.S. detention practices have documented genuine, recurring problems. Deaths in ICE custody are not hypothetical. 17 is a documented count across roughly 18 months, and conditions in privately operated detention facilities have drawn scrutiny from inspectors general, civil liberties organizations, and members of both parties in Congress. A foreign government has a legitimate interest in the welfare of its citizens held in another country's custody. Consular access and diplomatic advocacy are standard international practice, and Mexico is doing what any government with an engaged foreign policy would do when its nationals die in another country's detention system.

What the Legal Actions Can Actually Accomplish

The criminal complaint route faces a steep climb. Foreign governments cannot direct U.S. prosecutorial decisions. Filing complaints with the DOJ or state AGs puts the cases formally on record, but whether those offices open investigations is entirely at their discretion.

The civil litigation path is more unpredictable. Private detention companies are U.S. corporations subject to U.S. courts. A foreign sovereign filing civil suits in American courts is unusual but not legally impossible. Whether Mexico has standing, and whether the cases survive motions to dismiss, will depend heavily on which courts they land in and what specific causes of action Mexico's attorneys plead.

Velasco said Mexico would also work with U.S.-based organizations to amplify the effort and seek meetings with members of Congress. That's standard diplomatic pressure, not a legal mechanism, but it has moved the needle on detention conditions before.

Velasco's Stated Priority

"The priority of our work is always the defense of the human rights of our fellow citizens," Velasco said at the news conference.

That's a defensible principle. Critics will note that Sheinbaum's administration has been more publicly aggressive about deaths that happen on U.S. soil than about the considerable violence inside Mexico's own borders. None of that changes whether the 17 deaths in U.S. custody warrant investigation. Those are separate questions.

The concrete next step to watch: whether any of the private detention operators respond to the cease-and-desist letters before Mexico's SRE moves to file civil suits. Velasco did not specify a deadline for company responses.