They can try now! Because he is pardoned for the existing convictions not for future convictions
Good luck, when the main investigators have since gone to prison for crimes related to this investigation.
Unless Trump screwed up the paper work, he’ll have been pardoned for past crimes, which includes the murder.
That is interesting. I'd suspect he could possibly be found guilty of attempted murder, and have the sentence reduced or eliminated by arguing that his previous sentence unjustly assumed guilt for this as well, and factored it into the sentence he already served.
If I remember correctly, there were comments from both the prosecution and judge that would basically prove that point- and they allowed evidence related to those other crimes in the trial. If they could prove this misconduct, they may even be able to argue double jeopardy.