Then again, maybe in the right cases, the death penalty should be allowed

[Gaius Scribonius Curio]

Oh and my point was that I cannot see where, as an atheist(who sees humans as the kind of soulless biochemical robots), one draws the value of life from but that's a different topic and I'm sorry for almost deriving this one.

Firstly, I'm an atheist and afaik you aren't a soulless biochemical robot.
Just because I have no belief in God or an afterlife, doesn't mean that I don't have an animus or soul... But this is all metaphysical speculation, so Back to Topic!

I am anti-death penalty for a number of reasons. Firstly, no matter what the crime, if capital punishment is implemented this gives some people, most probably the government, or select members of the Justice department, the power of life and death over everyone. This means if they believe you guilty for a crime you can be executed. This is giving too much power to those people in these positions, and power corrupts...

This leads directly to my second point. Humanity is most definitely not perfect. Saying executing people was acceptable, did you get the right person, or was the person in fact in the right?There are always going to be mistakes, it is a lot easier to release someone from prison than it is to resurrect someone. Or so I've been told.

Continuing on, the argument that the death penalty is worse than life in prison. I'm sure that not everyone is like me (IE: ridiculously hyperactive, has too much energy, can never be completely still, loves sport etc etc.). However, having your every move restricted is not going to be fun or easy for anyone. There is no guarantee that the criminal will feel remorse, however if they do there is a lot of time to think about it. Death ends everything, all the dreams and hopes for the future (although life imprisonment would do this to), but also any time spent contemplating their crime, any chance for rehabilition into society. The only time the death penalty could be definitively worse than a life of incarcaration, would be if they suffered onehundredfold in the fires of hell, which as I've said I don't believe.

To me the death sentence is a way of venting the victims family's, friends, and societys' spleen on an unfortunate criminal.

There is no justification for ending another person's life.