ABC News does not know what happened before this altercation.

Legal expert Gregg Jarrett analyzes new video of Alex Pretti showing alleged assault on federal agents a week before Minneapolis shooting.

Alex Pretti was forcefully taken to the ground by federal immigration agents after kicking out the tail light of their vehicle during a Minneapolis protest 11 days before he was shot and killed by Border Patrol officers,

Was Alex Pretti fired over allegations of inappropriate conduct with patients several months before federal agents killed him on a Minneapolis street? No, that's not true: The viral fake news article that started this rumor listed the wrong hospital

Newly released video appears to show Alex Pretti confronting federal agents before his fatal Minneapolis shooting during enforcement operations.

Tensions are escalating in the wake of the shooting of Alex Pretti.

A widely shared image of federal agents surrounding ICU nurse Alex Pretti as one agent holds a gun to the back of his head appears as real as it does horrific.

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.

White House insiders reveal how the Trump administration scrambled to respond to Alex Pretti's shooting. A "snow drought" is concerning scientists. And previewing the Winter Olympics.