Captital Punishment, a Pseudo-solution

The blog Warning: We Must Save Innocent Lives posits that "The death penalty helps prevent future crime a murder has been deterred from committing more crimes when he is executed." This conclusion was made using data gathered by the Gallup Poll, which is emotionally stemmed fluxuating opinions, and a study more than 20 years old that arbitrarily claims for every execution 18 murders are deterred.
The statement made by the author, "The death penalty prevents murders from murdering again and saves innocent lives and we must choose the option that saves innocent lives," is misleading and no way to be proven. I do agree with the fact that if someone were to be executed they would not be able to murder anybody due to the fact that they would cease to exist, but the claim to know their future intentions is far fetched. There is no way to be sure that someone will take another life again and there is no way to be certain that by executing someone you are saving an "innocent" life. With this idea all one would be achieving is deterring the possibility of one person committing a murder crime.
In the blog Warning: We Must Save Innocent Lives the claim was made that "the death penalty helps prevent future crime." According to www.disastercenter.com/crime/, the statistics do not support this conclusion. This website includes statistics from the year 2007. In 2007 from the 36 states that do enforce the death penalty the average number of murders per 100,000 inhabitants was about 6.2. In 2007 from the 14 states that do not enforce the death penalty the average number of murders per 100,000 inhabitants was about 3.1. According to these statistics capital punishment has very little or no effect as a deterrent.
However, I do agree with the author that feeding the system money for long-term imprisonment is not an effective enough way to deal with murder crimes as a deterrent. I believe there are other successful methods as a means of deterrence such as organizing neighborhood watches and after-school programs for young teens and young adults. Methods of prevention prove to have more effective outcomes than dealing with problems as they come.
Justifiable murders, capital punishment, is not the answer to dealing with murder crimes. All it may do is serve as an irrational quick-fix for the victims unfortunately going through a tragedy.