KANSAS CITY, Mo. -- The Precious Doe murder case consumed Sgt. Dave Bernard for four years. Erica Michelle Marie Green Sgt. Dave Bernard Thursday, Bernard talked about the case for the first time. He told KMBC's Jim Flink that the beheading of Erica Green -- known for four years only as Precious Doe -- was the most disturbing case he has ever worked on. "All of us are still stunned that the investigation ended the way it did," Bernard said. Bernard's team of investigators followed up more than 1,000 leads in the four years since the child's headless body was...