
@DougS
You're also assuming that correct matching is the intended purpose. As opposed to giving a pretense for whatever the failed mall cops wanted to do anyway, as with k9 "alerts".
If the algorithm performs terribly for non-Caucasians, giving DHS an excuse for enhanced screening/interrogation, that may be more of a feature than a bug. "We're not illegally profiling, the computer said they looked like criminals."