Psychological criminal profiling.

[Shell B]

Yeah, it doesn't seem like any of these sources is reliable. Also, given that the definition varies so widely that it would be next to impossible to get a reasonable list together of what we would consider a serial killer versus what the FBI would consider a serial killer today. It's obvious to me that the looser definition that neither of us likes would certainly contain a group proportionate to the population, which will only ever be what we have to go on, since no one keeps a list of just Ted Bundys apparently. Also, if say we realized that there were fewer serial killers in China for example, would that mean it's because there are fewer white males? Impossible to know. In my opinion, it's best to look for people based on other factors.