Some times after getting a shipment of MAX-Sec prisoners, or after a death row prisoner becomes one. You get a Legendary prisoner that you can just not take the abuse from or you just feel like getting rid of him! Well this guide will show you how to do JUST THAT!

First things first you are going to want to create a death chamber. (in this case a shower block)
with the walls being a 9X9. (made out of perimeter walls so that they can't break out)
then you must place a power substation (or a metal detector. or any high powered electrical.) inside the shower area and add a few capacitors (if and some shower heads. (some sprinklers outside would be helpful because they don't put out the fire fast enough to kill everyone in the room but they will save your prison.)

when the shower area is complete you should then place a solitary or remote door as the entrance (so that they can't break that down) you are ready to save your prison the trouble of a legendary prisoner!

Now you have a death chamber (it may have been modified so its just the cell of the super max and a metal detector inside, where you summon firefighters to light it up. then dismiss them)
you then want to have your prisoner(s) inside the room.then make sure to get that power generator wet (Dirty minds BEGONE!!) A substation is best because it will make a fire EVERY time!

Then what you want to do is make sure that your doctors are on stand by as well as riot guards (just because something might not go to plan) then you make sure that the fire after it starts gets that prisoner(s) out of your hair! If it does not... ...Well at least you did tons of damage.

Please if I missed anything about HOW else to get a prisoner dead WITHOUT it being let go (if one can leave so can 20) let me Know and I will add it!