Yesterday afternoon in Detroit, via ABC affiliate WXYZ:

We're told the ICE officer was serving the warrant to 19-year-old Terrence Kellum as part of task force investigation. Police say he was allegedly wanted for armed robbery.

The task force was known as "D-FAT" which stands for Detroit Fugitive Apprehension Team. It includes members of Detroit Police and U.S. Marshals.

[Detroit's police chief, James] Craig also said the officers were allowed inside, and one agent may have been threatened, and that's when he opened fire.

"I am committed that the Detroit Police Department will do a very thorough and very timely investigation," Craig said. He also said he is committed to having a conversation with the Wayne County Prosecutor who will make the final decision on what will happen next.