刚查了，你说的有道理

Yes, a mentally ill person who kills someone can be charged in the US, but the outcome may differ due to the potential for an insanity defense. If the defendant is deemed not competent to stand trial or if they can prove their actions were a result of a severe mental illness, they may be found "not guilty by reason of insanity" (NGI). In such cases, the individual is typically committed to a mental health facility instead of prison, and may eventually be released if deemed no longer a danger to themselves or others.