Chemistry Unit

Drug Chemistry Units are located in both the Headquarters (Santa Fe) and Las Cruces Forensic Laboratories. These units are responsible for the analysis of submitted evidence for the presence of controlled substances. Through the use of chemical and instrumental analyses, the forensic chemists can identify almost any compound. Drug evidence normally consists of assorted powders, crystalline rocks, tablets, capsules, liquids, and/or plant materials.

Chemists utilize a battery of preliminary chemical and chromatographic tests to determine whether controlled substances may be present in evidence items.

Positive identifications of controlled substances are achieved using the infrared spectrometer and the gas chromatograph-spectrometer. The predominant drugs submitted are methamphetamine, cocaine, marijuana and heroin.

The DPS Las Cruces Forensic Laboratory also performs fire debris analyses for the entire state. Such analyses attempt to determine whether or not a flammable liquid was employed as an accelerant at a fire scene. When flammable liquids or their residues are detected, the nature of the accelerant can also be determined (i.e., gasoline, charcoal lighter fluid, kerosene, etc.).

The forensic drug scientists are often called upon to present their results as expert witnesses in the New Mexico Judicial Districts.

For technical assistance regarding proper collection of controlled substance or fire debris evidence, contact the Chemistry Units at:

Contact Information for Santa Fe and Las Cruces DPS Forensics Labs