Phrenology
Scientists and detectives of the late 1800s developed a pattern to distinguish criminal faces from normal faces. Some of them got carried away with analyzing every bump on the skull, which discredited the original studies. Modern "scientists" treat the whole subject with disdain because modern "scientists" "know", based on complete reversal and falsification of all available facts, that all humans are precisely identical.
Nevertheless, there is such a thing as a criminal face. Many criminals
don't have criminal faces, but there's a good chance that people with criminal faces will have criminal tendencies.
Great example:
Check out the brows on this brother-sister pair who tortured and killed one of their friends for snitching.