NEW! Instant Shooter Identification GSR Kit™

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Law Enforcement Technologies and Sandia National Laboratories have developed a field-portable test kit that will provide the law enforcement community with immediate confirmation of recent gun use and assist in rapidly focusing on key suspects. Subsequent to the field-testing, the swab can be retained and analyzed by scanning electron microscopy for the presence of lead, antimony, and barium.

This Gunshot Residue (GSR) Field Test Features:

Over 90% accuracy rate through extensive field testing
Helps Law Enforcement to quickly determine who has fired a weapon while in the field--yields results in five minutes!
Minimal training required
Simply swipe suspect, saturate swab with solution and observe results
Kit weighs less than 5 ounces
Long shelf-life, can be stored in squad car trunk.
Results obtained in field yield investigative data
When desired, positive test results can be preserved and delivered to Crime Lab for SEM testing, which can provide evidentiary data.
Cost is a fraction of most tests
Now GSR testing can be performed on a range of suspects, or to analyze a crime scene.

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Additional information available below.

Sandia National Laboratories says:

“...statistics show that the first 72 hours is the most critical time for investigation of a crime scene. (This) field-portable test kit will provide the law enforcement community with immediate confirmation of recent gun use and assist in rapidly focusing on key suspects.”

“...this test has been shown to detect as little as 700 nanograms of nitrocellulose.”

The combination of a presumptive field test that also provides court-admissible confirmatory evidence sets a new precedence in law enforcement technology.

The swab / test kit is self-contained and provides results in less than 3 minutes.

GSR

Positive field response of ISid-1 test swab

Law enforcement agencies can significantly reduce the cost of prosecution and increase their conviction rates and by eliminating costly SEM analysis of “blank” samples and focusing on those containing gun shot residue.

As part of an assessment to evaluate the capabilities of the Field Test Kit for Gunshot Residue Detection several hundred field tests have been performed to estimate the probabilities of misclassification errors – probabilities of a “positive” result using the field test kit when no recently fired gun was involved or a “negative” result when a gun had been fired. These studies have shown that a both false positives and false negatives occurred in approximately 10 percent of the tests performed. The presumptive field test provides results that are 90% accurate.

SEM analysis of ISid-1 swab, 22 caliber pistol (22 short) with backscattered image and elemental maps

Scanning Electron Microscope (SEM) analysis of the swab used for the field test provides high magnification imaging of GSR particles. The characteristic shape of the particles, along with energy dispersive x-ray mapping yields court-admissible evidence that the residue is the result of firing a gun. Testing to date has shown 100% correlation between both positive and negative field results and subsequent SEM analysis. A simple, 10-minute sample transfer and preparation procedure is available.