You are here

DNA and Latent Fingerprint Collection from Same Sample


OBJECTIVE: Develop a method for latent print work and DNA analysis from the same sample while optimizing DNA extraction protocol for fingerprints deposited on evidentiary materials used for human identification.

DESCRIPTION: Forensic evidence collection is an essential tool for acquiring information for law enforcement investigations and latent fingerprints are the main piece of evidence to investigate due to the unique and unchanged nature of the ridge patterns of each individual. Leveraging the S&T Directorate’s current DNA Collection Efficiency project, identify techniques to both recover latent fingerprint and to extract DNA profile from the same piece of fingerprint evidence collected in the crime scene.

PHASE I: Determine by theory, previous research in related areas and/or laboratory experimentation, the most efficient and practical approach to both preserve the physical integrity of latent fingerprints on the typical surfaces on evidence encountered by Custom and Border Protection (CBP) forensic analysts while not interfering with DNA collection, extraction and analysis. Indicate for each method investigated, latent fingerprint image and DNA collection efficiency, physical and chemical degradation, detection sensitivity in the context of real world scenarios on each surface material from sample evidence and a prototype chemical or optical concept in the Phase I final report.

PHASE II: Construct, operate, and analyze the data from one (1) working prototype device based on a down select from concepts identified in Phase I, calibrated against a laboratory gold standard and real world evidence. The prototype will be delivered to the CBP LSS forensic laboratory no later than six months before the contracted closing date of the Phase II project with a comprehensive performance analysis. Government personnel will operate the system in the CBP LSS forensic laboratory for the remaining 6 months of the Phase II project.

PHASE III: COMMERCIAL OR GOVERNMENT APPLICATIONS: A commercial version of the system, if system performance is confirmed, will be developed, and then installed to operate in the CBP forensic laboratory in Houston, TX. A system architecture, specification, and operator manual will be provided with the system for CBP to procure additional systems for use in other CBP forensic laboratories.

US Flag An Official Website of the United States Government