Visual memory is known to not be accurate.
Just giving you reasons why someone might think there was some racial profiling happening.
If women never lied about who raped them or who drowned their kids and so forth, this would not be a problem...but as it is....
PS. The most famous case of all.
http://www.law.umkc.edu/faculty/projects/Ftrials/scottsboro/scottsb.htm