The killing of a citizen of the United States by a federal agent during a demonstration in Minnesota’s Minneapolis city against Trump’s crackdown on immigrants has caused outrage and triggered more protests.
US citizen Alex Pretti, 37, is the second person fatally shot by Immigration and Customs Enforcement (ICE) agents this month.
- list 1 of 3Thousands in Minneapolis brave bitter cold to protest ICE crackdown
- list 2 of 3Federal agents shoot another US citizen dead in Minneapolis
- list 3 of 3US federal agents shoot and kill US citizen in Minneapolis
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Videos of confrontations between ICE agents and Minneapolis residents have flooded social media, showing some of the 3,000 officers who are deployed in the city stopping, questioning and detaining residents.
In one case, immigration agents escorted a US citizen – a grandfather of Hmong ancestry – out of his house in his underwear in freezing weather. In another case, the father of a five-year-old girl was briefly detained and zip-tied after he said a federal agent falsely accused him of not being a US citizen because of his accent. The agency is also under scrutiny for reportedly dispatching a five-year-old boy to knock on the front door of his home to lure relatives outside before agents then took the child into custody.
The events have led to protests and prompted confusion over what ICE is legally allowed to do in public and private locations. Are there limits on when and how ICE can approach or detain people? Does the law differentiate between encounters in public and private spaces, such as a home? And is the Supreme Court becoming more tolerant of aggressive ICE actions?
Legal experts weighed in on the public’s constitutional protections from immigration stops and detentions.
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What rights do people have when approached by ICE?
Federal law gives immigration agents the authority to arrest and detain people believed to have violated immigration law. But everyone, including immigrants suspected of being in the US illegally, is protected against unreasonable searches and seizures under the Constitution’s Fourth Amendment.
“All law enforcement officers, including ICE, are bound by the Constitution,” said Alexandra Lopez, managing partner of a Chicago-based law firm specialising in immigration cases.
The Fourth Amendment doesn’t stop ICE from trying to deport people who have broken immigration law, but it has traditionally constrained the agency. The more extensive an enforcement action is, the higher the bar for immigration officers to justify their actions.
For example, officers can question someone in a public place, but more extensive interactions – such as a brief detention that’s not a formal arrest – require a “reasonable suspicion” that someone has committed a crime or is in the US illegally, the Supreme Court has ruled.
Reasonable suspicion “has to be more than a guess or a presumption”, said Michele Goodwin, a Georgetown University law professor. To meet this standard, a reasonable person would need to suspect that a crime was being committed, had been committed, or would be committed.
Agents must meet a higher bar to arrest someone. They need “probable cause”, which generally requires sufficient evidence or information to suggest a person has committed a crime.
What is a ‘Kavanaugh stop’?
Historically, the Supreme Court has ruled that racial or ethnic profiling is unconstitutional. But a recent opinion by Supreme Court Justice Brett Kavanaugh gave ICE increased discretion to use race as a factor for stopping and questioning people.
In the Noem vs Perdomo case of 2025, Kavanaugh was one of six justices who voted to stay a lower court ruling in favour of plaintiffs challenging federal immigration enforcement tactics in Los Angeles, California. Kavanaugh wrote that “apparent ethnicity” could be used as a “relevant factor” in determining reasonable suspicion as long as it was combined with other factors and not used on its own.
Before Kavanaugh wrote this, courts had “often ruled that agents could not stop someone just because they ‘looked like an immigrant’ or were in a high-crime area”, Lopez said. But if immigration officers follow Kavanaugh’s guidance, “it gives ICE a lot more discretion and justification to profile”.
Critics of Kavanaugh’s opinion “argue that the ‘relevant factor’ language invites abuse, opening the door to ethnic profiling”, said Rodney Smolla, a Vermont Law and Graduate School professor.
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But Kavanaugh’s opinion was not cosigned by other justices, and it came from a procedural ruling rather than a substantive one, so its legal impact might be limited. The Supreme Court “has not made a definitive ruling on ‘Kavanaugh stops’ and their permissibility”, said Ilya Somin, a George Mason University law professor.
Somin and other legal analysts have said Kavanaugh appeared to dial back his support for race or ethnicity as a factor when he wrote a different opinion several months later, in Trump vs Illinois, which stopped the Trump administration from deploying the National Guard in Illinois.
Do people’s rights differ inside their homes versus in a public space?
The Supreme Court has generally ruled that, unless a resident grants consent, law enforcement cannot enter a private home without a warrant signed by a judge, which requires the government to provide evidence showing probable cause.
“This means a person inside the house generally need not open the door, need not converse with the agent, and may require the agent to slip the warrant under the door or hold it to a window,” Smolla said. There are some exceptions, such as when an officer encounters a violent crime in progress or someone needing medical care.
Securing a judicial warrant is time-consuming and is typically reserved for high-priority cases in which people are suspected of crimes beyond immigration violations, Lopez said. “It’s much easier for ICE to arrest individuals in public,” she said.
In the past, federal immigration officers would typically not enter homes forcibly if they only had an administrative warrant issued by ICE, without a judge’s approval. Some lower courts have ruled in the past that entering homes without a judicial warrant violates the Fourth Amendment.
Specific ICE officials have the authority to issue administrative warrants. The warrants require “probable cause to believe” that the person named in the warrant is subject to removal. But they are not reviewed by anyone in the judicial branch.
A leaked ICE memo approved entering homes without consent using an administrative warrant alone, as long as a final order of removal has been issued, The Associated Press news agency reported on January 22.
The AP, citing a whistleblower disclosure, said the memo has been used to train new ICE officers, and “those still in training are being told to follow the memo’s guidance instead of written training materials that actually contradict the memo”.
The memo dated May 12, 2025, signed by acting director of ICE, Todd Lyons, said the Department of Homeland Security (DHS) “has not historically relied on administrative warrants alone to arrest aliens subject to final orders of removal in their place of residence” but added that “the DHS Office of the General Counsel has recently determined that the US Constitution, the Immigration and Nationality Act, and the immigration regulations do not prohibit relying on administrative warrants for this purpose”.
If this policy were to be challenged in court, it is unclear whether it would be ruled constitutional.
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What can people do if they think ICE has infringed on their Fourth Amendment rights?
If one believes that their rights were violated, perhaps causing an injury or property loss, their options for suing for compensation are limited.
Unlike many state laws, federal law generally prohibits civil lawsuits against federal officials for violating people’s rights. A 1971 Supreme Court decision briefly loosened these prohibitions before tightening them again.
Erwin Chemerinsky, dean of the University of California-Berkeley’s law school, and Burt Neuborne, a New York University emeritus law professor, wrote, “In one case, the Supreme Court held that people who had been illegally thrown off the Social Security disability rolls and were left without income could not sue, even though they had been given no due process. In another, the court declared that a man dying of cancer after the prison repeatedly denied him any medical care could not sue.”
David Rudovsky, a University of Pennsylvania law professor, said there might be an opportunity to sue under a different law, the Federal Tort Claims Act.
Still, he said, plaintiffs would face a steep challenge: “It’s not an easy path, and most people can’t afford to retain a lawyer.”
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