But in the absence of any physical evidence of a murder, it really does become difficult, if not impossible, for a conviction to occur.???(Page 4 of 4)A confession, on its own, is not sufficient, Levin said.???It???s very important to have a body, especially in a case where the possible perpetrator is already incarcerated for the rest of his life,??? he said.Authorities said Hall, who claimed in 2