Video shows Alex Pretti allegedly spitting at agents before Border Patrol shooting in Minneapolis. Former prosecutor explains why no charges filed.

A newly released video shows Alex Pretti confronting federal officers on a Minneapolis street 11 days before he was fatally shot in another encounter with CBP agents, a Pretti family representative confirmed to CBS News.

WASHINGTON (AP) — The Justice Department has opened a federal civil rights investigation into the shooting of Alex Pretti, the Minneapolis resident killed Saturday by Border Patrol officers, Deputy Attorney General Todd Blanche said Friday.

Federal investigation into Alex Pretti shooting focuses on use-of-force policies, despite gun groups raising Second Amendment concerns.

Donald Trump on Friday called Alex Pretti an "agitator and, perhaps, insurrectionist," marking an increase in the intensity of his rhetoric toward the ICU nurse fatally shot by federal agents after the president recently said he wanted to "de-escalate a little bit" in Minnesota.

Between Jan. 24 and Jan. 29, Trump officials' statements evolved in a case that has become a major political liability for the president.

The investigative arm of the Department of Homeland Security, known as Homeland Security Investigations, had been leading the investigation into the fatal shooting of Alex Pretti in Minneapolis.

The Department of Homeland Security says the FBI is now leading the probe into the shooting of Alex Pretti, the Minneapolis resident killed by Border Patrol officers.

The Justice Department said it has opened a civil rights investigation into the shooting of Alex Pretti, a significant reversal in the department’s approach to his death that comes as masses of protesters took to frigid streets in Minneapolis, Portland, Maine, and other US cities to rebut the Trump administration’s immigration tactics.

Donald Trump has appeared to undermine Second Amendment rights in statements about Alex Pretti’s killing. Many in the firearms community are going along with it.