Before Fingerprints, America Had No Reliable Way to Know Who You Were Talking To
For most of American history, proving who someone actually was in a court of law was shockingly difficult. Criminals walked free under borrowed names, innocent people were imprisoned based on mistaken identities, and law enforcement had almost no scientific tools to close the gap. The transformation that followed — from crude body measurements to fingerprints to DNA — didn't just change policing. It changed what 'proof' means in America.