There have been a number of murder cases with convictions and no body. I can't remember the names of any of them, but do remember seeing some of them on "The New Detectives", and reading about a couple of them in books by Ann Rule. There was one case I recall where there was no body, but the medical examiner was able to determine by the amount of blood found on the carpet pad and floor under the pad (carpet had been discarded, and another one placed over it, if I recall) that no one could have lost that much blood and survived. A case that Ann Rule (true crime writer) wrote about, there wasn't even any blood found. It was a completely circumstantial case where a wife had disappeared, and the husband's lies and bizarre behavior were enough for the prosecutor to put a case together and get a conviction.
Good illustrations!