Arkansas State Crime Lab
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Physical Evidence

The Physical Evidence Section handles a large variety of cases including, but not limited to, rapes, homicides, burglaries, motor vehicle hit-and-runs, property crimes, and arson.

This section has two units: Serology and Trace Evidence.


The Serology Unit analyzes evidence items for the presence of body fluids (blood, semen, saliva). This unit also collects tape lifts from evidence where hair and fiber analysis may be probative. In addition, Serologists will collect samples for transfer or touch DNA. As an example, a knife handle will be examined for skin cells that may be used to develop a DNA profile of an individual who may have held the knife.

PE - Serology

Trace Evidence

The Trace Evidence Unit analyzes hairs, glass, paint, fibers, primer gunshot residue from suspects, physical matches, duct tape, unknown substances, headlamp filaments and accelerants.

Dog Hair

The instruments used for analysis are the stereomicroscope, polarized light microscope, GRIM3 (Glass Refractive Index Measurement), µFTIR (Fourier Transform InfraRed), microspectophotometer, SEM/EDS (Scanning Electron Microscope/Energy Dispersive Spectrometer), and GC-MS (Gas Chromatography-Mass Spectrometer).

Upon completion of their examination, the analysts will write reports on their findings. They will also appear in court for expert testimony.

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Contact Information

Arkansas State Crime Laboratory
3 Natural Resources Drive
Little Rock, AR 72205
(501) 227-5747 | (501) 227-5936
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