> huge failure of ICE

This is the wrong framing. This was a premeditated (first degree) murder. The killer, Jonathan Ross, had previously tried cowboy heroics with a moving vehicle and had ended up being dragged a few hundred feet - surely a traumatic experience. In the run-up to the murder of Renee Good, he went out of his way to approach her vehicle using the positioning of his own body to box it in - in direct violation of written ICE policies of how to interact with motor vehicles (for obvious reasons).

The reasonable inference is that this was setting up a pretext to use his gun if the vehicle started to move, while leaving enough room to jump out of the way - so as to be able to attack a driver who might disobey him, while not ending up getting dragged again. And when Good started to reverse the vehicle, he acted according to that plan.

The involvement of ICE itself is that they are protecting this violent criminal from seeing justice. Not merely as an immediate reaction of waiting until the dust settles, but as long term policy. This indicates the organization itself is a criminal conspiracy, rather than an institution of civil society governed by the rule of law. Of course this is merely one among many other such indications.