Probably (I noticed you didn’t go to the effort either), but the trend is so well known it is taught in Aberrant Psychology courses: (at least in America) non-white people don’t bother becoming serial killers. Maybe they just always come up with a reason for their violence and thus never end up being in that “because I felt like it” category. Still, serial killer-ship seems to a byproduct of an otherwise safe, stable society, so I suspect this trend does not hold true in upper class Nigerian neighborhoods, etc.