Debate.

 1. The study clearly mentions that it compares cases similar to those that carry the death penalty, many of these cases carry life sentences, in addition, the study also mentions that in Tennessee killing criminals costs more than giving them life sentences.

2. Our judicial system is imperfect (especially mine that I live in Mexico), practically all the countries in the world have political prisoners, and practically all those that have the death penalty kill innocent people.

3. some states are limited, countries like china, cuba, north korea and others do not have a good judicial system.

4. Legalizing the death penalty will not reduce those losses.