Looking at Killing individuals what is the lowest level you will think it is right to kill someone for their crime

Genocidal Leader (Hundreds, thousands, millions)
Mass-Murderer (Dozens, hundreds, thousands i.e. terrorist)
Serial Killer (Multiple; One/two at a time)
Child-Rapist Murderer
Rapist Murderer
Assassin (Specific Target - Unknown - for money)
Murderer (Specific Target - Known - revenge)
Assault/Robber/Burglar Murder (In the act of committing a crime)
Crime of Passion (Lovers Triangle, etc.)
Metally impaired Murderer
Drunk Driver / Speeding Driver killing
Accidental killing (Negligent)
Adulterer (no one dead)
Drug Courier (no one dead)

While against the "Death Penalty" for reasons outlined above. If it was to be enforced, I would probably support "Rapist Murderers" and worse being executed.