Forensic bias

“In one of Dror’s most famous studies, he took sets of fingerprints which had been examined by forensic scientists five years before and found to be matching. He gave the same prints to the same unsuspecting experts and this time told them they needed to examine them because the FBI had mistakenly identified them as matching.

Four out of the five experts changed their previous conclusions and said they did not match. The only thing that changed between the two examinations was the information about the FBI findings and with it the clear suggestion the prints did not match.”


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