I feel that it's worse for parents to have a missing child than knowing that the child has been murdered. At least the parents will not have the hope that the child will eventually come back one day. And, the parents know that the child has gone to somewhere better - heaven. Besides, the parents will not have to worry that the missing child is suffering out there, or being abused by others. This longing for the return for the child may lead to depression and long term suffering because there is no end to this.