The only chance any of them see justice is if the US is invaded. Even in a Nazi/SS scenario, only about 0.03% of the SS were convicted and very few of those the rank and file are analogous to the ICE on the street.
If you mean extra-judicial punishment, then the chance of that is also zero. The bravest we have representing us is on the street, and even of those all they did was shout "murderer" then back off and let their friend bleed out when the police said they were not allowed to render aid. So basically it is safe to say of those of us speaking who were not on the street already, that we would do even less than that.
Best case scenario is the people vote "lets not do that again" and we actually don't. But in no case do the murderers actually find accountability.