Let us imagine some scenarios. There are constant low level crimes that are always going on. Perhaps the best example is drug usage an ever present issue. Whereas different groups commit such "crimes" enforcement is anything but even. Also those so caught often fall prey to factors that make it harder for them to get a job or a home and thus are more likely to end up re-offending. One can imagine "proving" that certain genetics that just happen to be correlated with African heritage correlate with offending when it actually correlates with being more likely to be caught and then racism laundered by bad science and stats justifies the extra scrutiny that results in additional scrutiny that results in greater prosecution and greater persecution.

How about increasingly good tech makes smaller and smaller amounts of DNA testable providing a genetic trail that proves not your participation in the crime but merely your presence at some point where it happened or even in areas where people you may have touched carried it to. With nearly a third of murders unsolved it would be awfully convenient to pin some of those on people that just happened to pass nearby especially if the person is a minority or someone with a record. The fact that most cases in America are conducted by threatening parties with penalties many times worse than they would experience and extracting pleas makes this substantially easier especially when you wont necessarily get great representation if you are poor. Take this plea for 20 years with parole possible after 10 years or we will fight to have you yourself murdered for a murder you didn't commit!

Another example derive increasingly good data on people's likely health outcomes as health care costs skyrocket due to being designed to extract value and not to promote health. First wait until it is in danger of destroying an increasing toll of lives not saved due to lack of funds then instead of fixing ANY of the systemic flaws promote the the idea that your insurance/care is only becoming so expensive that you can hardly afford it because you are carrying people who aren't being responsible by paying for their own care extra points if you tie this to race, nationality, or best yet both.

Completely ignore the fact that with sufficient foreknowledge costs are mostly predictable and the entire purpose of a cost pool is to provide a single predictable cost financed by transferring funds from the those who are not needy to those who are while allowing the person running the pool to earn interest in the interim and stick to the narrative that the people with predictable costs this year aren't paying their share and fight for the ability to offer insurance indexed to their increasingly predictable costs.

If you do a good enough job at this you can extract increasing rents for years while killing more people than Hitler before you manage to collapse health care as you know it and eventually the surrounding society as the only people that can afford healthcare will increasingly be those who don't need it or those experiencing a truly difficult to foresee misadventure.

When the serfs realize how badly they have it you can graduate from Hitler level of excess mortality to great leap forward levels in the ensuing violence and famine.

Edit: The cheap shot is of course people can use a pre existing database to decide whom to target for murder.