They should be tried like any other person accused of a crime. After they are found guilty, they should be led outside and executed. Same goes for pedophiles. We shouldn't be paying for these "people" to live out their lives in an adult daycare center. That's money better spent on education or public works.
What if it wasn't the right person ? Imagine executing someone who wasn’t responsible. Anyone can be wrongly convicted. You can reverse jail time, you can’t reverse capital punishment