I don’t think ICE have any powers to detain or arrest or impede anyone unless they believe they are an illegal immigrant or are assisting / harbourin illegal immigrants.
Most of these ICE officers are just dumb-fucks who were enticed in recently. They are not trained and clearly they know they are not accountable.
After this incident, they got in the cars and just drove off. No preservation of the scene, no expectation of enquiry, no need for the murderer to hand over his gun... just went on with their day.
It's about time people took the threat of this administration seriously. They will ruin the US but they are coming for other countries and their backers will also push cunts like Farage onto us.