If you knowingly take a life for a wrong a reason than the answer for you should be death. We have to show society that we are serious on this issue. So many people commit horrible crimes and use certain excuses. If you do the crime, you have take responsibility for your actions. In agreeance with Dawn's point of view, I believe that capital punishment is justified.
Capital punishment is the most severe and harsh punishment that is available.
This type of punishment does a few things, one being society is at ease with killing of the murder or of whatever crime he is convicted of, the family of the victim is at ease once capital punishment is installed. If a convicted person is sentenced to jail for a murder, then he is sitting in jail with the opportunity to escape, paroll, the killings of more inmates, etc. If he doesn't care for other humans lifes, why would he care for his own life. Crimes are usually committed for a reason. Out of passion, hunger, starvation, anger, a mental disorder, many other reasons.