What is California doing with the death penalty

This is an article on the decline of the death penalty in the US. After reading the article, discuss in narrative form the following issues: 
The reason it has not been held to be unconstitutional by the Supreme Court;
Reasons for decline in use;
The role of the states and international processes (you may have to look on the internet for this perspective and through your research)
What is California doing with the death penalty
http://photos.state.gov/libraries/amgov/133183/english/P_You_Asked_WhyCapitalPunishment_English.pdf
THIS ASSIGNMENT MUST BE 4 FULL PAGES.