I suppose a federal case could be made against her for depriving the little girl of her civil right to life.
Heck they retried those cops in California years ago after they were aquitted by using that method.
Double jeopardy only seems to be ignored in some cases, like you point out. The feds can say it is for a different crime (Rodney King beating), but it was not.
Yeah, but on a different charge - a federal charge.