Americans are killed by police all the time, and by other Americans. We've already decided as a society that we don't care enough to take the problem seriously. Gun violence, both public and from the state, is accepted as unavoidable and defended as a necessary price to pay to live in a free society[0]. Having a computer call the shots wouldn't actually make much of a difference.
Hell, it wouldn't even move the needle on racial bias much because LLMs have already shown themselves to be prejudiced against minorities due to the stereotypes in their training data.
[0]Even though no other free society has to pay that price but whatever.