잠재지문 연구를 위한 인공지문 캐스트 제작

Abstract

Most of the fingerprints found at crime scenes are in latent fingerprint forms, and it is difficult to observe those fingerprints with the naked eye. Even if it is assumed that a latent fingerprint is remaining on an object, the method of developing the latent fingerprint differs depending on the surface type of the object. Therefore, a study must be performed by imprinting a latent fingerprint on an object, which is similar to the evidence found at a crime scene, to find an appropriate latent fingerprint development method. To do this, time and costs occur to recruit research participants, and these may cause disruption on arresting a suspect in a short time. Lothar Schwarz’s artificial latent fingerprint printing method, using an artificial sweat solution and an inkjet printer, can be used in a latent fingerprint research instead of using real human fingerprints. Although the major purpose of Schwarz’s method is to print out uniform fingerprint images on an A4 paper. Therefore, this approach has a limitation that it can only make imprints of fingerprints on thin and flexible materials such as copy papers and PVC films. To address this shortcoming, a Synthetic Fingerprint Generator(SFinGe, University of Bologna) computer program, a Printed Circuit Board(PCB) technique, and liquid latex are used to create an artificial fingerprint cast. With this new method, artificial latent fingerprint can be made on any surface types of material to find an appropriate latent fingerprint development method quickly during police investigations.