What would Jesus do?

I was watching the news yesterday morning as i got ready for work. They were reporting on the finding of a child's body buried in concrete in a care home in Jersey and the suggestions of wide spread cruelty to children. Their interview subject was a Jersey vicar. And on live national television he said we should treat people who mistreat children as it suggests in the old testament - we should hang mill stones around their neck and throw them in to the sea. Obviously, mistreating children is wrong but this seems a little much, particularly coming out of the mouth of a man whose religion is based on the teachings of Jesus. I am fairly sure Jesus was against tying mill stones around people's necks and drowning them. But I could easily be wrong - I am sure a vicar would know more about it than me...