For 10 points, name these identifying marks which supposedly are unique to each person.
Currently, 33 million of them are kept on file at the IAFIS building in Clarksburg, West Virginia. They replaced the Bertillon system of describing body shape soon after they were proposed for police work by Henry Faulds and Francis Galton, but mistakes in recent years have put their value in doubt. One error in analyzing them is blamed for the arrest of American lawyer Brandon Mayfield in relation to the Madrid train bombings. For 10 points, name these identifying marks which supposedly are unique to each person.
Currently, 33 million of them are kept on file at the IAFIS building in Clarksburg, West Virginia.
{fingerprints}