Arrested Japanese stalker used pupil image reflections(abcnews.go.com)
abcnews.go.com
Arrested Japanese stalker used pupil image reflections
https://abcnews.go.com/Technology/wireStory/arrested-japanese-stalker-pupil-image-reflections-66202013
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"[Tokyo Shimbun, a metropolitan daily,] also said people shouldn't make the V-sign with their hand, which Japanese often do in photos, because fingerprints could be stolen."