Do Ohio bishops want Ohio to end up like Mexico? Why bishops ignore the dangers of not having death penalty? The bishops have eyes but they do not see. They have ears but do not hear. Death penalty is according to the tradition of the church. Christianity is not opposed to death penalty.
Pope Benedict XVI may be opposed to death penalty but sometimes popes have been wrong. One pope was declared a heretic in 681.
Justice is a virtue. Justice demands suitable punishment for crimes. In some cases it is death penalty.
Prudence is a virtue. Allowing dangerous criminals to live is not prudent.
The church is opposed to abortion. Ohio bishops can direct their zeal and energy to have a legislation that will punish parents and doctors who abort foetuses who have resulted from marital acts and there is no danger to mother’s life. There is excommunication for abortion but that has not been effective. Prayers and vigils in defence of unborn are not enough.
The bishops can also try for gun control in USA. They can ask for repeal of second amendment. That will make it hard to own guns and reduce murders. In USA it is easy to buy guns in spite of several checks and then go and shoot anyone anywhere. There are vested interests who oppose gun control. What are bishops for if they can not take on vested interests?