My general opinion was that they were very strict and they were living behind time.
Answer:
Killing someone would be murder and it is illegal. So don't do it.
Explanation:
This may sound crude and i recommend not doing this. In medical terminology and psychological research, people can be so depressed the can be like a zombie and just be waiting for death to happen. They are not aware of their surroundings and they don't listen if they chose not to. That is the closest thing to being dead but still living and breathing.