Mr. Eisenberg. Mr. Latona, do you know how the known samples we have just marked 627, 628, and 629 were obtained?
Mr. Latona. How they were obtained?
Mr. Eisenberg. Yes. Can you tell the process used in obtaining them?
Mr. Latona. You mean in recording the impressions?
Mr. Eisenberg. Yes, sir.
Mr. Latona. Fingerprints are recorded by the use of a printer's ink, heavy black ink, which is first placed on a smooth surface, such as glass or metal, and it is rolled out in a smooth, even film. Then the subject's fingers are brought in contact with the plate by a rolling process, rolling the finger from one complete side to the other complete side, in order to coat the finger with an even film of this heavy ink. Then the finger is brought in contact with a standard fingerprint card and the finger again is rolled from one complete side to the opposite side in order to record in complete detail all of the ridge formation which occurs on the tip of the finger, or the first joint, which is under the nail.
Mr. Eisenberg. Did you received a second submission of known prints?
Mr. Latona. Yes; we did.
Mr. Eisenberg. When did you receive those?
Mr. Latona. Those were received in the identification division on November 29, 1963.