Psychological criminal profiling.

[Mr.Obvious]

I don't know.  One site I found listed a couple dozen or so black serial killers (I didn't count them).  Are they disproportionately white?  Perhaps, but do the numbers justify drawing conclusion about a hypothetical serial killer's race?  I think not.

Which is what I said. I did not say they should racially profile. I said the opposite.

Yes, according to what I've read from experts, they are disproportionately white. That could have to do with socioeconomic factors more than it has to do with race. Who knows? I sincerely doubt it has anything to do with actually being white, but there are more white serial killers than black serial killers.

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Interestingly, I find a number of different definitions for the term at any given time, so it depends on that as well. In this list compiled of the percentage of serial killers in any given decade, I find it curious to note that the number of black serial killers has gone up as the definition has changed to mean any person who kills more than one person in separate events. For example, if I shoot someone tomorrow and then shoot someone a month from now, I'm a serial killer by that definition. Earlier on, the term meant something very different. Personally, I think the definition they use in this paper is far too lax. It would mean Aaron Hernandez is a serial killer. I think the average person makes a distinction between gang and serial killings. However, even with the shift in definition, more than half of serial killers are white.

http://maamodt.asp.radford.edu/Serial%20...istics.pdf

ETA: The average IQ of a serial killer is 6 points less than average, if I'm reading that correctly. That's worth noting as well. Also, they said the lowest IQ for a serial killer was 54. Imagine being serial killed by someone that stupid? For some reason, being killed by an evil drooling moron throws me off more.

I don't know. I haven't seen the numbers  enough to be certain. So you could be right that there is some disproportion. But In a country with about 60% caucasians, wouldn't you expect to find most serial killers are white? In the source you provided, I don't see the tables being presented as relative frequency of serial killers, in accordance to the size of the subgroup. Meaning that I'm more prone to see it as absolute numbers. In which case a larger absolute frequency in a single subgroup may still not be disproportionate if it's the biggest subgroup..
Also, just glancing in the source you gave, isn't a serial killer someone who kills three or more people in a specific fashion or tied to a specific pattern, in seperate events? Rather than:

The unlawful killing of two or more victims by the same offender(s), in seperate events.

Edit: I missed, somehow, in your post that you too agree their definition is off. Apologies.

And then on page ten, it says:

As can be seen in this table, the commonly cited profile of a serial killer in the U.S. being a white, male, in his mid twenties is not accurate.

According to the table, most seem to be male. But only 52.5% seem to be white. In a country with 60% whites, that is not disproportionate. And definitely not in exhuberant fashion. If anything, it's less than we'd expect. Of course, it could still be there are relatively 60% or higher white serial killers in the grander serial killer population. But that they are more apt at getting away with it because they, on average, have more means to (as whites in America are relatively less poor and might very well be concidered less as possible killers through bias or there might be other things at play.) Or maybe not. Dark numbers are hard to work with.

So on the whole, I don't think that source builds your case. (Edit: ) Also because of the too vague definition. I don't think the Numbers comparing serial Killers and coming up with relatively less in the White subgroup are even accurately comparing 'serial killers'.

(Edit: I found an old source saying 61% in America were whites. But it turns out, another source maybe with a different definition, says it's up to 77% I don't know the exact number, though they seem to be the majority.)