An unusual prayer request

Received an email from a woman who would like us to add a 17 yr old boy name Billy on our prayer list.Billy is in jail. Billy killed her son at a party.Her son was trying to break up an argument between him and another guy and was shot.Her son was very religious and she feels if he was still alive he would want someone to pray for Billy.We pray that Billy will have remorse for what he has done.Also we pray the violence among young men will  oneday stop.