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If you follow the link, you'll see that the computer report had this message right at the top in massive letters:

THIS DOCUMENT IS NOT A POSITIVE IDENTIFICATION. IT IS AN INVESTIGATIVE LEAD ONLY AND IS _NOT_ PROBABLE CAUSE TO ARREST. FURTHER INVESTIGATION IS NEEDED TO DEVELOP PROBABLE CAUSE TO ARREST.

I mean, what else could the technologists have done?

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Well .. it looks like it isn't enough, and additional human-factors oriented requirements need to be documented - like deliberately engineering the system to produce a certain number of false alarms so the police always have to do additional work to discard them - as opposed to only sometimes.

I wonder if the problem here is just the way traditional policing works, not even the technology.

It is indeed the way traditional policing works. The average police officer things facial recognition is the visual equivalent of Google and since he/she can similarly rely on search results - they either have no idea about false positive biases based on race or worse, probably are too lazy to dig deeper.

Though the suffering of the victims of such wrong matches is real, one consolation is that more of such cases will hopefully bring about the much needed scepticism in the results so that some old-fashioned validation/investigation is done.

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