Couldn't be clearer. "John Paul the Great"
"May the death penalty, an unworthy punishment still used in some countries, be abolished throughout the world." (Prayer at the Papal Mass at Regina Coeli Prison in Rome, July 9, 2000).
"A sign of hope is the increasing recognition that the dignity of human life must never be taken away, even in the case of someone who has done great evil. Modern society has the means of protecting itself, without definitively denying criminals the chance to reform. I renew the appeal I made most recently at Christmas for a consensus to end the death penalty, which is both cruel and unnecessary." (Homily at the Papal Mass in the Trans World Dome, St. Louis, Missouri, January 27, 1999).