The death penalty should be exercised by civil government. The Responsibility Of Civil Government. To provide honest men to rule. They are to execute judgment speedily and correctly. Rulers are to be treated with respect.
Taxes are to be paid.
We are to obey laws and rulers. We are to pray for rulers. There Are Limits To Civil Government . If obeying man's law causes us to disobey God, then we are to obey God rather than man. This does not mean that we can disobey laws that are unjust, unliked, etc.