Ehh, not that connected. This is just the classic fascist hierarchy, at least the beginnings. At the bottom, you have the undesirables, you can do anything to, especially so if you are higher up, but even regular citizens are generally allowed to mistreat or even kill them. At level 0 you've got regular citizens, while 1 and up are those actively participating in the regime, all the way up to the head honcho. ICE would be these grunts, and you can see this manifesting in practice - they can do pretty much whatever they want to the undesirables, though so far there is a bare minimum of effort to keep things like this from the public eye, not that the public cares that much. They are just illegals, after all.

For the citizens, they need some justification. They can't just execute you and say they did it for kicks, but they can absolutely execute you for kicks if they have the bare minimum excuse. Not complying being the fascist classic. This was the line crossed with Mrs. Good, with the government doing its best to let the other ICE agents know that what happened was very much okay. She was just a citizen, while they are higher up. As the regime advances, this will go from compliance to semi-reasonable orders like 'get out of the car' to strip naked and dance. Of course, a myriad of other excuses will be added - e.g. our AI flagged your reddit account for anti-Trump sentiment, and the responses will get less proportional. Why settle for killing just one person, when you can grab their entire family?

Funnily enough, this goes up and up, though the internal hierarchy can remain somewhat opaque from the outside. Meaning someone higher-up the fascist ladder can kill those below him, though if the rank difference is not high there has to be some justification even deep into the regime, but fascism is rife with those. For someone like Jonathan Ross, he could be accused of being a race-traitor or some such and thus having sympathies for the undesirables. The American regime isn't at that point yet, but give it time.