Enacting a death penalty moratorium is definitely worthwhile since DNA evidence has proved the innocence of several individuals on death row.

Enacting a death penalty moratorium is definitely worthwhile since DNA evidence has proved the innocence of several individuals on death row. Supporters of the moratorium in California demand an independent study of the manner of execution of the death penalty by the State, and if there are racial or geographical disparities in its application. Design a sampling model for such a study?