Pale Rider
Legendary Member
Circus cannon.
You fire the convict off the cliffs of Dover.
Depending on the severity and nature of their crime the distance they are shot, and if they get a helmet or not.
If they can swim back to shore, we let them back in.
Murder is quite bad though, so I'd set it up for a landing in Normandy, no helmet.
Very witty.
I'm sure the murdered lad's family would be delighted to see the case discussed in this way.