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obviously because faces physically change when you do crime. charles manson was a happy camper before he started a murderin. All in the upper lip curvature, because why would a criminal smile in a mugshot.

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that brings up an important point -- being convicted or incarcerated might affect one's daily mood enough to change their resting facial expression -- so to control for that the study should have made sure to only use photos of criminals taken before their first arrest or conviction, perhaps even before their first confessed criminal act if possible.

I'm not sure if you are trolling or not. Please don't.

All in the upper lip curvature, because why would a criminal smile in a mugshot.

Why would a non-criminal smile in a mugshot?

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