RJ Lee Group Headquarters

Tarah Helsel

Supervisor and Forensic Scientist

Tarah Helsel is a Supervisor and Forensic Scientist, and testifying expert at RJ Lee Group. She is an expert in the preparation, analysis, interpretation and reporting of gunshot residue (GSR) evidence using Scanning Electron Microscopy/Energy Dispersive Spectroscopy (SEM/EDS). Ms. Helsel is also an active member of the team responsible for RJ Lee Group’s successful laboratory accreditation by ANSI-ASQ National Accreditation Board in the areas of Trace Evidence – Gun Shot Residue and GSR Distance Determination. Utilizing near-infrared spectroscopy to create a reference library of spectra, she also has researched the instrumentation and its relevant pharmaceutical applications.

Ms. Helsel has experience testifying for the defense and prosecution, and is accepted as an expert in the area of GSR in Kansas, Maryland, Delaware, Louisiana, Michigan, Hawaii, Washington, Florida, Pennsylvania, California, New York, Nebraska as well as Bermuda. She is a member of the Mid-Atlantic Association of Forensic Scientists (MAAFS) and the American Society of Trace Evidence Examiners (ASTEE).


Contact Tarah Helsel


To read publications, Materials Insights and blog articles by this expert, please click here.



Education History

  1. 2016

    B.S., Forensic Science

    Waynesburg University

Professional Experience

  1. Present
    Forensic Scientist
    RJ Lee Group, Inc.
  2. 2015
    Gateway Analytical

Memberships & Awards

  • Member
    Mid-Atlantic Association of Forensic Scientists (MAAFS)
  • Member
    American Society of Trace Evidence Examiners (ASTEE)
  • Most Outstanding Senior, Undergraduate Organic Chemistry Student
    Waynesburg University, from the American Chemical Society Division of Organic Chemistry
  • Highest Ranking Forensic Science Program Graduate
    Waynesburg University
  • DeLap-Holocomb Scholarship
    Gamma Sigma Epsilon