This one. Knew it was a while back, but never would have thought it was almost twenty years.
https://en.m.wikipedia.org/wiki/D.C._sniper_attacks
For some reason, one fact I do remember from the time was that one of the guys was a minor, or at least he counted as such in the state which was the most obvious place for the trial - is that possible, that different states have different definitions of adulthood?
Either way, I remember they were trying to find a justification either to have the trial in a state which would count him as an adult or else which was simply prepared to execute minors.
I say "for some reason" but really I suppose I remember this detail cos it was the first time I had seen the vindictiveness and arbitrariness of US justice... those differences between states and the way that individual officials could agitate to move it to the one which could give the most serious punishment seemed to make it less like a system of rules being dispassionately applied and more like a personal vendetta between the DA (or whoever it was) and the snipers on trial.
Since then I have seen it many times. The vindictiveness of prosecutors and their pronouncements making it seem more like revenge than justice... except how can they be seeking revenge for a crime which was not committed against them? So sometimes it feels that US justice is not the faceless machine it ought to be, rather it does have a face, and the face is that of a bloodthirsty maniac.