Ok, so I've been doing some research on the death penalty, and I ran across this great site:
He makes excellent points.
First, the death penalty is a deterrent to crime. When the death penalty was not used, murder rates escalated, and when the death sentence was reinstated, they dropped dramatically.
Secondly, there is a large body of historical evidence to prove that the death penalty, and often only the death penalty, is capable of stopping crime effectively.
Thirdly, the majority of people worldwide support the death penalty. This is prevalent even in nations that do not have the death penalty. A large majority (60%-70%) support the death penalty.
Life without parole, or LWOP, is dangerous as it does not prevent more killings from convicts, for several reasons: prison murders, parole killings, escapees, and convicts set free due to overflowing jails.
Many arguments used against the death penalty are cliche and either off topic, moot, or anti-law (that is, anarchist)
Capital punishment is often much less expensive than LWOP. This is not a well known fact, primarily due to the fact that most abolitionist LWOP costs are calculated for an average LWOP prison sentece, not that of a murderer. Death sentence level LWOP prison costs are much higher due to increased security, etc.
Capital punishment is not against the constitution, but rather is implied several times in the 5th amendment.
Christianity and Jesus are not diametrically opposed to capital punishment. In fact, not only is it mentioned throughout the Old Testament, even outside of the Levitical law, but it is also mentioned by Jesus Himself.
Because of all these points, I firmly support the death sentence.
I eagerly await the comments =]