Acquisiton of Sebaccous Fingerprint Topology Using Columnar Thin Films (CTF) on Forensically Relevant Substrates.

摘要

The purpose of this basic-science research project was to expand on successfully completed proof-of-concept experiments by, first, determining the scientific basis of and the application of columnar thinfilms (CTFs) to capture friction ridge detail found in latent fingerprints on nonporous forensically relevant textured substrates and then to compare CTF development of fingerprints with commonly employed fingerprint development techniques used for that purpose. Latent, sebaceous fingerprints were deposited on forensically relevant substrates, and then CTFs were deposited on these latent fingerprints using the conformal-evaporated- film-by-rotation (CEFR) technique. The specific objective of this basic research was to investigate the fundamental scientific and physical characteristics required to use CTFsto capture and visualize latent, sebaceous fingerprints by identifying the necessary CTF materials and deposition conditions required to develop fingerprints on selected forensically relevant substrates. Secondarily, the research design included a comparison of CTF-developed prints with traditionally developed fingerprints on the same substrates,with minimum variability of factors that could be controlled.