These puzzies complainin bout sufferin should be made to make a choice:
-1- Die the way you killed your victim, least as close as we can get to it; or
-2- The needle.
Alla them puzzies will pick the needle.
Course, the answer is:
Nitrogen asphyxiation.
Sealed room w/windows.
Any guard can give em the pills to knock em out, then turn on the nitrogen and walk away.
Killers never know what hit em.