Doppelgängers who were part of the inspiration of fingerprint identification
The man on top is Will West, the bottom William West. These men are not related. They were both at Leavenworth Prison in 1903, and due to considerable confusion because of their near identical appearance and identical names, inspired the origin of using fingerprints to identify individuals. Fascinating story.
Source and full story here: https://www.dailymail.co.uk/news/article-1392418/amp/The-amazing-pictures-sparked-need-fingerprinting.html