Minneapolis live updates: ICE arrest powers expanded, memo says

Amid calls for her resignation and impeachment, Department of Homeland Security Secretary Kristi Noem said the scene in the hours after the fatal shooting of Alex Pretti by federal officers was "chaotic" and they were getting information from "what we knew to be true on the ground."

"We were using the best information we had at the time," Noem told Fox News' Sean Hannity on Thursday night in her first comments since Saturday.

Noem said that the FBI is now leading the investigation into the shooting. Previously, DHS said the FBI was assisting Homeland Security Investigations.

"We will continue to follow the investigation that the FBI is leading and giving them all the information that they need to bring that to conclusion and make sure the American people know the truth of the situation," she said.

Noem's tone was a shift from her remarks Saturday when she called Pretti's conduct "the definition of domestic terrorism," without evidence, which sparked backlash.

Asked about using the term "domestic terrorism," Noem said authorities are "continuing to gather information" and said an investigation will help provide information about both the shooting involving Pretti and the earlier shooting death of Renee Good.

"We believe we can always do better and we seek to do that every day," Noem said Thursday.

She also said she is "grateful" for President Trump's wisdom in sending Tom Homan, with whom she reportedly has an icy relationship, to Minnesota in the hopes he can talk to leaders there.

When asked about critics on Capitol Hill, she said "radicals" are attacking her for "just doing my job."

"I'm following the law, and enforcing the laws like President Trump promised he would do," she said.

-ABC News' Luke Barr

House Speaker Mike Johnson talked to reporters about the fatal shooting of Alex Pretti involving federal agents for the first time, calling the incident "deeply concerning," but also cautioning to "allow the investigation to play out."

"You don't prejudge anything. Tape can be deceiving. There are different angles," he said Thursday. "New information comes out every hour, every day, and that's why we allow due process to play out, and we'll see what happens."

The speaker called the incident "very unfortunate," but blamed the chaos on local and state officials.

"What we do know that everybody can acknowledge is that you got local and state officials in Minnesota who are encouraging citizens to disobey law enforcement, to impede their operations, to get in the middle of it," Johnson alleged.

-ABC News' John Parkinson

In response to President Donald Trump saying Minneapolis Mayor Jacob Frey was "playing with fire" by not enforcing federal immigration law, Frey maintained Thursday that that isn't the city's job.

"Our police officers will do their jobs, they're not gonna do somebody else's job," Frey told reporters while in Washington, D.C., for the U.S. Conference of Mayors.

"I want our police officers stopping murders from happening, preventing carjackings, responding to 911 calls," he said. "You know what I don't want them doing? I don't want them spending a single minute hunting down a father who just dropped his kids off at daycare, who's about to go to work a 12-hour shift, who happens to be from Ecuador. That guy makes our city a better place."

Frey also said he is hopeful federal forces would start to leave Minneapolis, but added, "I will believe it when I see it."

-ABC News' Friz Farrow

Minneapolis Mayor Jacob Frey said his city is "experiencing an invasion" and warned that other cities could be next "if we do not speak up" during remarks at the U.S. Conference of Mayors in Washington, D.C. on Thursday.

"We are on the front lines of a very important battle, and it's important that we aren't silenced, that we aren't put down," Frey said. "This is not a time to bend our heads in despair or out of fear that we may be next, because if we do not speak up, if we do not step out, it will be your city that is next."

Frey said Minneapolis has worked with federal partners to bring crime down and that Minneapolis is a safe city. But, he said, it is "less safe when chaos reigns supreme."

"It is less safe when families do not feel comfortable going to school or buying food at the grocery store because they're worried that their very family might get ripped apart," he said. "It is less safe when we have roving bands of agents marching down the street just looking for somebody who might be concerned."

Frey also addressed the federal investigation into him and Minnesota Gov. Tim Walz, saying the Department of Justice is "being used as a weapon."

"They're investigating me and several other local elected officials, not because we've done something wrong, but because we have exhibited one of the core responsibilities that both I and you have as mayors, and that is the core and foundational responsibility to speak on behalf of your constituents," he said.

In closing, he called on his fellow mayors to "stand together."

"We got to hold rock solid. We cannot back down," he said. "Our cities, our mayors are what will hold this democracy together."