Minnesota officials say the FBI has blocked their access to an investigation into the fatal shooting of a woman by a US Immigration and Customs Enforcement (ICE) agent.
People have taken to the streets of Minneapolis to protest the killing of 37-year-old Renee Good, who died on Wednesday after being shot in her car.
Minnesota Governor Tim Walz has accused the Trump administration of blocking state officials from involvement in the case, but the US vice-president said the investigation is a federal issue.
Officials have offered differing accounts of the incident, with the Trump administration claiming the ICE agent was acting in self-defense, while local officials say the woman posed no danger.
Homeland Security Secretary Kristi Noem has claimed the ICE agent shot Good multiple times because she was trying to run over the officer in her car.
The US Federal Bureau of Investigation said it would investigate the incident.
Minnesota's Bureau of Criminal Apprehension (BCA) said the FBI had initially agreed to a joint investigation with state officials but then reversed course and denied the state access to materials and evidence.
Without the ability to access all the necessary case materials and evidence, the BCA has 'reluctantly withdrawn' from the investigation, the BCA's superintendent Drew Evans said in a statement.
Speaking at a news conference on Thursday, Walz said he was worried the federal government would not be able to carry out an unbiased investigation. 'It feels now that Minnesota has been taken out of the investigation. It feels very, very difficult that we will get a fair outcome.'
Vice President JD Vance told reporters on Thursday that the investigation into the shooting was a federal issue, arguing it would go against precedent for a local official to be involved in prosecuting the case.
From a criminological perspective, jurisdictional claims in cases like this are often less about legal requirements and more about political efforts to control the investigation and shape its outcome, according to criminology professor Edward Maguire.
The exclusion of state authorities from the probe into Good's killing is likely to undermine public trust, he added.
However, the state could still file criminal charges later against the federal officer who killed Good, said Bryna Godar, a staff attorney with the State Democracy Research Initiative at the University of Wisconsin Law School.
