The 13th Amendment is a pretty big one, worth starting there.
> I'm interested because while it's easy to find rules and laws that are explicitly 100% to the advantage of non-whites over whites (affirmative action, Gladue in Canada, etc), I've not been able to find any that work the other way around.
If your criteria is that it must be "explicit", you're dismissing the entire concept without considering it. These laws and rules take advantage of context and produce predictable outcomes without needing to put on a white robe and state their intent.
> (Also worth noting "more likely to end up dead for no reason at all" isn't actually true[0]; there's no statistical evidence that cops kill blacks more than whites in comparable situations.)
> [0] https://www.nytimes.com/2016/07/12/upshot/surprising-new-evi....
I can't get past the paywall, but it is actually true. What I can see above the paywall fold doesn't even represent your claim. And even if it did, "in comparable situations" isn't the criteria. Cops can (hypothetically) behave equally violently in all situations, and still be more likely to kill black people because they police black people and communities more.