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Polymers examinations.(Evidence Examinations)(Brief Article)
Polymer evidence typically consists of pieces of plastic or other man-made materials. The source, use, or manufacturer of polymer evidence usually cannot be identified by composition analysis.
Motor-vehicle trim can be compared with plastic remaining on property struck in a hit-and-run case. The manufacturer, make, model, and model year of a vehicle can be determined if a manufacturer's part number is on the trim.
Plastics in wire insulation and miscellaneous plastics such as buttons can be compared with known sources.
Questions concerning polymers evidence should be directed to 703-632-8441. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence.
* When a motor vehicle has been in an accident, fragments (e.g., plastic lens covers) can be left at the scene. These pieces can be physically reconstructed with the remnants of the fixture ...
- Lubricants examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Submit entire...clothing) when possible. Air-dry the evidence and package separately in paper bags. * Absorb suspected lubricants onto a...
- Pepper spray or foam examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Submit entire...clothing) when possible. Air-dry the evidence and package separately in paper bags. * Moisten a clean cotton cloth or swab...
- Soil examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...directions including Requesting Evidence Examinations and Packaging and Shipping Evidence...dry the soil and the clothing and package separately in paper bags. * Carefully remove...vehicles. Air-dry the soil and package separately in paper bags. * Ship known and...
- Glass examinations.(Evidence Examinations)
- Handbook of Forensic Services January 1, 2003 700+ words
...the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. Comparison * Submit...the glass. Label the samples INSIDE and OUTSIDE and package separately in leakproof containers such as film canisters or plastic...
- Bank security dyes examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Only evidence...resealable plastic bag. Collect an unstained control sample, package separately, and submit it with the dye-stained evidence. When...
- Adhesives, caulks, and sealants examinations.(Evidence Examinations)(Brief...
- Handbook of Forensic Services January 1, 2003 700+ words
...the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * When possible...pill bottle. * If possible, submit a suspect source. Package separately.
- Chemical examinations of general unknowns.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Submit powder...resealable plastic bag. Collect an unstained control sample, package separately, and submit it with the stained evidence. When cutting...
- Abrasives examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...evidence should be directed to 703-632-8441. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Employ personnel familiar with engine and machinery operations and mechanics...