sooey said:How many witnesses would be called? there are potentially very many.
Indeed so! But, if he was guilty, the prosecution wouldn't need to call very many of them to prove their case. Witness for the defense might be harder to find.
and also said:How much would it all cost?
Fair point. Justice costs money. What do you suggest?
and also said:What would the sentence be if he was found guilty?
A sentence would obviously be pointless, unless you want to dig his body up and put it in the gibbet like Oliver Cromwell.
and also said:It would be another great earner for the legal profession if we started pointlessly trying dead people.
Very true - and most such trials would indeed be pointless. It's only the huge public interest that makes this one different.