The best story ICE could make up, after 12 hours, is that ICE agents shot someone in the head because they believed the person they shot, who was not accused of any crime, was a different person also not accused of any crime, and so "public safety" required killing them on the spot.
It took DHS 12 hours to come up with this statement, And the best they could come up with is that ICE shot and killed an unarmed man who didn’t present a threat to the agents. They know they fucked this one up. And it’ll be up to state and local prosecutors—not the feds—to make the case