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Collecting a Sample from a Smear
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Collecting a sample from a smear is different from collecting from a thicker stain. Use the following procedure:
- Use a slightly moistened (with distilled water), sterile cotton swab and concentrate the substance on the tip of the swab.
- Follow with a second dry swab.
- Allow the swabs to air-dry.
- Label and package evidentiary swabs in envelopes or bindle paper.
Additional Online Courses
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- Non-STR DNA Markers: SNPs, Y-STRs, LCN and mtDNA
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- What Every Investigator and Evidence Technician Should Know About DNA Evidence
- Principles of Forensic DNA for Officers of the Court
- Law 101: Legal Guide for the Forensic Expert
- Laboratory Orientation and Testing of Body Fluids and Tissues
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- Español for Law Enforcement
- Amplified DNA Product Separation for Forensic Analysts
Date Created: June 12, 2023