This is on the Wikipedia website. It has good information about capital punishment on it. It should help your thoughts on the matter and mold your thinking, but should not be used as fact information.

This website offers a lot of information about the death penalty such as history and the different methods of execution.

This website is on about.com. It's by Kimberly and Albrecht Powell. It talks about capital punishment in the state of Pennsylvania. It gives historic facts about lynching (hanging), the electric chair, and lethal injection.