“Considering the fact that a conviction in Bais Din is not final until the execution is actually carried out, I might think that there may be grounds to re-open the case.”
That is not necessarily the case under secular law; courts have ruled that even evidence of actual innocence is not necessarily relevant if it was not brought up at the original trial.
“It is moral for innocents to be killed.”
I call that murder.
And you’d likely be a lot less smug if it were a family member who had been wrongfully convicted.