We've deciphered the truth behind claims about his death at the hands of Border Patrol agents and the federal government's response.

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.

Several factors converged to force a remarkable shift in the federal government’s aggressive efforts in Minnesota.

The video, recorded Jan. 13, shows Pretti kicking out the rear taillight of a vehicle before being tackled by federal officers.

Two officers fired their guns during the fatal encounter with Alex Pretti in Minneapolis over the weekend, according to an initial report to Congress from the Department of Homeland Security reviewed by CNN.

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.

A group of hundreds, many of them nurses still wearing badges after walking from their nearby hospitals, performed a Nightingale Tribute — a traditional send off for nurses — for Pretti, who was killed Saturday by immigration enforcement agents in Minneapolis.

The FBI is taking the lead in a Justice Department probe into whether federal agents violated the civil rights of Alex Pretti when they fatally shot him.