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Staff

Linda Lewis
Linda Lewis,
(865)
576-9382,
E-mail


PostDoc

Giorgia De Paoli
Giorgia De Paoli,
Phone: (865) 946-1393,
E-mail

 

 

ORNL Staff Associates
(
Energy & Transportation Science Division )

Maggie Connatser,
(865) 946-1393
Email

Samuel A. Lewis,
(865) 414-5259
Email

 

 

 

 

Publications

Materials and Techniques for Forensics
Latent-Fingerprint Detection on Difficult Evidence

The ORNL forensics research team is working with numerous collaborators (Naval Research Laboratory, University of Tennessee, and other research groups) to identify robust and fieldable methods (including chemical development, SERS imaging, and reflective scattering techniques) for the detection fieldable fine mist nebulizer of latent fingerprints that would otherwise remain undetected using traditional techniques. ORNL is teaming with Local and Federal agencies (Knoxville Police Department, ATF, NRL) to enhance one of the most widely used forensic techniques used to identify an individual associated with a crime or national-security incident. Under both normal aging and extreme-event conditions, ORNL is studying the changes in latent fingerprint compositions and identifying associated in-growth products.  As information is gained from these experiments, new instrumental and chemical methods of detecting latent fingerprints that key off of surviving fingerprint constituents are being identified and assessed.  One new instrumental method being developed with a manufacturing partner (ChemImage, Inc.) is surface enhanced macro-Raman spectral (SERS) imaging of latent fingerprints.  Sponsors of the ORNL forensics research team have included the National Institute of Justice (NIJ), Federal Bureau of Investigations (FBI), OSD Counter Narcoterrorism Technology Program Office (CNTPO), and the Technical Support Working Group (TSWG).

Accomplishments

  • Supporting mass spectral method development and the study of eccrine and sebaceous fingerprint decomposition and in-growth product identification based upon various aging scenarios
  • Identifying new chemical and instrumental visualization techniques keying on surviving fingerprint constituents
  • Identifying optimum SERS agents for macro-Raman imaging of latent fingerprints.
  • Designing a field portable macro-Raman imager to detect SERS enhanced Raman signals originating form surviving fingerprint constituents.
  • Tailoring methods for field portability
  • Supporting DOD, DOJ, and DHS Missions.

Objective

Develop field portable methods of locating and imaging latent fingerprints that would otherwise remain undetected.  As illustrated below, a new visualization technique utilizing differential light scatter resulting from the presence of untreated and invisible fingerprint residues has evolved from the team’s research. ORNL is working to detail the scatter mechanism in order to further develop and exploit this methodology for the detection of fingerprints that would otherwise remain undetected.

 

           

The ultimate program goal is to develop robust, efficient fingerprint visualization techniques supporting rapid assessment field and laboratory needs.

Physical Organic Chemistry R & D Projects


Provided by Oak Ridge National Laboratory's Chemical Sciences Division
Rev:  March 2009