Stephen Miller said the White House is reviewing whether Border Patrol agents followed protocol before Alex Pretti’s killing.

A shooting involving the U.S. Border Patrol prompted a law enforcement response in Arizona’s Arivaca area on Tuesday, local authorities said.

As ICE and Border Patrol agents increasingly work alongside one another nationwide, it's often become difficult to tell them apart.

It comes as Bovino and some Border Patrol agents are leaving Minneapolis.

CBS News obtained a memo from Customs and Border Protection detailing the deadly Minneapolis shooting of 37-year-old Alex Pretti on Saturday by federal officers. Matt Gutman has the details.

Bovino has served as a public face for Trump's immigration crackdown—and now, for the mounting controversy it's drawing.

Two shootings involving agents – one fatal in Minnesota, the second in Portland – led to increased scrutiny of federal agents amid ongoing arrests.

Border Patrol Commander Greg Bovino is expected to leave Minneapolis Tuesday, a White House official and another Trump administration official familiar with the decision told NBC News

Senate Homeland Security Committee Chair Rand Paul (R-Ky.) has sent letters to the heads of Immigration and Customs Enforcement (ICE), Customs and Border Protection (CBP) and U.S. Citizenship and Immigration Services (USCIS) to testify before his committee amid growing public controversy over immigration enforcement operations in Minneapolis and other communities.