If there can be a weirder collection site than one assembled by a former federal homicide prosecutor, the Doctor is hard pressed to think of it. The website created by Tad DiBiase discusses the intricacies of investigating and prosecuting murder cases where the body of the victim has not been found. I'm sure one of the questions he answers is the Doctor's first: How do you know a murder has been committed if there is no body to be found?
If this is something that YOU want to investigate, you'll be welcome to read all the details Mr. DiBiase makes available.
Ted DiBiase's book, "No-Body Homicide Cases: A Practical Guide to Investigating, Prosecuting, and Winning Cases When the Victim Is Missing" is available directly from the publisher.