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Collection procedures for dry stains on non-absorbent surfaces are:
- Submit the entire item if possible
- If not, use the wet/dry swabbing technique
- If unable to do either of the above, the scraping method also may be used. This is a method to be used in a controlled environment (i.e., no wind or traffic) and where the scrapings will not contaminate other evidence. This method is rarely used on scene. a new or clean scalpel blade or 3x5 index card to scrape the stains form the surface
- Scrape the flakes onto clean, white paper and fold the paper properly (druggist fold/bindle)
- Use a new or clean scalpel blade or 3x5 index card to scrape the stains form the surface
- Scrape the flakes onto clean, white paper and fold the paper properly (druggist fold/bindle)
- Place sample in a labeled envelope that provides reference information from where the sample was collected
Additional Online Courses
- What Every First Responding Officer Should Know About DNA Evidence
- Collecting DNA Evidence at Property Crime Scenes
- DNA – A Prosecutor’s Practice Notebook
- Crime Scene and DNA Basics
- Laboratory Safety Programs
- DNA Amplification
- Population Genetics and Statistics
- Non-STR DNA Markers: SNPs, Y-STRs, LCN and mtDNA
- Firearms Examiner Training
- Forensic DNA Education for Law Enforcement Decisionmakers
- 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
- DNA Extraction and Quantitation
- STR Data Analysis and Interpretation
- Communication Skills, Report Writing, and Courtroom Testimony
- Español for Law Enforcement
- Amplified DNA Product Separation for Forensic Analysts