An unnamed witness provided more details in a federal court filing Saturday night about the shooting in Minneapolis of 37-year-old Alex Pretti.

The witness, whose name was redacted in court documents, said immigration agents pepper-sprayed three observers, including Pretti, before an agent shoved a woman to the ground.

"More agents came over and grabbed the man who was still trying to help the woman get up."

The witness said that agents pushed Pretti to the ground and added that "it didn't look like he was trying to resist, just trying to help the woman up."

"They threw him to the ground. Four or five agents had him on the ground and they just started shooting him," the witness said. "They shot him so many times."

The witness said they recorded a video that "accurately depicts the events leading up to the agents shooting him and several minutes afterwards."

The declaration was filed Saturday by the ACLU of Minnesota as part of an emergency motion to lift a stay on a federal judge's order that barred immigration agents from arresting protesters or using nonlethal weapons against them.

-ABC News' Laura Romero and Luke Barr

Senate Minority Leader Chuck Schumer said in a statement Saturday night that Democrats will block efforts to move forward with a package of funding bills if the bill that funds the Department of Homeland Security is included in the package.

"What’s happening in Minnesota is appalling —and unacceptable in any American city. Democrats sought common sense reforms in the Department of Homeland Security spending bill, but because of Republicans’ refusal to stand up to President Trump, the DHS bill is woefully inadequate to rein in the abuses of ICE. I will vote no," he said.

The Senate needs to pass a package of six government funding bills by Friday in order to avert a partial government shutdown. At least 60 votes are needed to tee up votes on any of the appropriations bills.

-ABC News' Allison Pecorin

Department of Homeland Security Kristi Noem called the shooting a "tragic situation" before arguing that the shots were "defensive" because that the agent was "fearing for his life." 

"This looks like a situation where an individual arrived at the scene to inflict maximum damage on individuals and to kill law enforcement," she said, echoing earlier characterizations by Border Patrol Commander at Large Greg Bovino.

Minnesota Gov. Tim Walz and Minneapolis Mayor Jacbo Frey have disputed those characterizations.

ABC News' Luke Barr asked  what evidence Noem had to make those claims that 37-year-old Alex Pretti wanted to injure or hurt law enforcement and, but she did not answer the question.

-ABC News's Emily Chang

The Gun Owners Caucus released a lengthy statement following the shooting death of 37-year-old Alex Pretti in Minneapolis.

Pretti was a legal gun owner who had no criminal record, the Minneapolis police chief said.

"We are deeply concerned by this morning’s reports that a federal law enforcement operation in Minneapolis resulted in the fatal shooting of 37-year-old Alex Pretti by federal agents," the group said in a statement.

The group added that "despite widespread speculation regarding intent, there has been no evidence produced indicating an intent to harm the officers." The group called for a "full and transparent investigation by both state and federal authorities."

"Every peaceable Minnesotan has the right to keep and bear arms—including while attending protests, acting as observers, or exercising their First Amendment rights. These rights do not disappear when someone is lawfully armed, and they must be respected and protected at all times," the caucus said.

Former President Bill Clinton issued a statement on Sunday speaking out about the "unacceptable" and "horrible scenes" in Minneapolis and other communities, including the fatal shootings of Renee Good and Alex Pretti.

"At every turn, the people in charge have lied to us, told us not to believe what we’ve seen with our own eyes, and pushed increasingly aggressive and antagonistic tactics, including impeding investigations by local authorities," Clinton said.

"Over the course of a lifetime, we face only a few moments where the decisions we make and the actions we take will shape our history for years to come. This is one of them," Clinton said.

"If we give our freedoms away after 250 years, we might never get them back. It is up to all of us who believe in the promise of American democracy to stand up, speak out, and show that our nation still belongs to We the People," he said.