Minneapolis live updates: DOJ launches investigation into Pretti killing, Deputy AG Blanche says

Sen. Lindsey Graham, R-S.C., has called the treatment of ICE officers "unconscionable" as he was asked about his objections to proceeding on a government funding deal on Thursday, sending the government ever closer to a partial shutdown with a little more than 24 hours until funding runs out.

"From a Republican point of view, the cops need us right now. They are being demonized. They're being spat upon. They can't sleep at night," Graham said. "Are they right to want to change some ICE procedures? Absolutely. But I'm not going to lead this debate for two weeks before I can explain to the American people what I think the problem is. The problem is, structurally, for four years, the country was ruined."

If Senators can't win over the objectors by Friday, they'll force the government into a partial shutdown. The Senate will reconvene at 11 a.m. Friday to see if they can reach an agreement.

Any agreement they do reach would still need to be approved by the House, so at least a brief partial shutdown is, at this stage, highly likely.

-ABC News' Allison Pecorin and Rachel Scott

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

Tom Homan said that ICE will be working with county jails in an agreement with Minnesota Attorney General Keith Ellison to arrest undocumented immigrants in a "common sense" approach to tackling illegal immigration.

Homan said that this method is "safer for the community, it's safer for the agent and it's safer for the alien," and suggested that this would result in "less agents in the street and more agents in the jail."

Trump administration border czar Tom Homan said in a press conference in Minneapolis on Thursday morning that "sanctuary cities are sanctuaries for criminals" and that he will now focus on regaining order by removing "threats from the community."

Homan added that he will be working to identify and remove undocumented immigrants that "pose a public safety threat and a national security threat."

"I didn't come here looking for photo ops and headlines," Homan said. "I come here looking for solutions."