Whoa! I expected a white guy.
Seems to be an unreported and rising trend, might check out this study
rbbm.
http://www.crimeculture.com/Contents/Articles-Winter10/branson.html
"The US media’s focus on violent crimes often depicts African-Americans as vicious criminals—murderers, drug dealers, perpetrators of assault and theft—yet resists portraying them as serial killers, a term legally defined by the FBI [1] as three or more murders separated by a cooling-off period. This article suggests several factors that have converged to allow the anonymity of African-American serial killers to exist and thrive. It is crucial to note that legal and cultural assumptions about black serial predation may result in this group remaining undetected by law enforcement."