Reply #26: Sorry. I have to disagree.

[GreenStormCloud]

I understand your reasoning. Due to the lack of firm knowledge the temptation is to assume the distribution that is already known. However, we do have some experience that we can bring to the problem. Stranger murders are the most difficult to solve. Consider the case of serial killers, like Ted Bundy, or the Beltway Snipers. Because they were strangers, there were few clues to follow.

The worst are the traveling serial killers. Several of these are believed to be truck drivers who lure women into their truck with offers of seeing the country, kill them and dump the body in a different state.

Even a murder by a local mugger is hard to solve, even with witnesses. So I believe that almost all of the unknowns are stranger murders.