Im completly and totally agaist death penalty.
I think it is a complete barbarian to do such a thing still today.
Iven if you are 100% responsible for every act you do, still than you must at least understand what have u done, what why u did that. You cannot just kill someone to solve a problem that is much deeper than appears. (like lots of cases of students who kills other students) the state is very responsible for verything that happens to their people.
Anyway, everyone has its own opinon.