We tend to not doing that once we have them in custody. Instead we keep them alive until we get a conviction...then we need to kill them!
Trials are set to have both sides prepare/present their evidence of guilt or innocence.
We don't need to deny this POS a speedy trial.
In fact, IMO, he should face a military tribunal, given the history of violence against this Administration/POTUS.
And his execution should be on YouTube.