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Book: FBI Handbook of Crime Scene Forensics by Federal Bureau of Investigation
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Authors: Federal Bureau of Investigation
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the opposite side of the painted surface.
Package paint specimens in leakproof containers such as vials or pillboxes. Do not attach paint particles to adhesive tape. Do not use plastic bags, cotton, or envelopes to package paint specimens.
Pepper-Spray or Pepper-Foam Examinations
Oleoresin capsicum is a resin in various peppers. It may be used in self-defense sprays or foams. Ultraviolet dye (orange) and/or tear gas also may be in the sprays or foams. Items can be analyzed for the presence of oleoresin capsicum, dye, or tear gas.
Questions concerning pepper-spray evidence should be directed to 703-632-8441. Follow the evidence submission directions, including Requesting Evidence Examinations and Packaging and Shipping Evidence .
Submit entire items (e.g., clothing) when possible. Air-dry the evidence, and package separately in paper bags.
Moisten a clean cotton cloth or swab with isopropanol (rubbing alcohol), and wipe over the suspected sprays or foams. Prepare a second moistened cloth or swab as a control. Air-dry the cloths or swabs and pack separately in heat-sealed or resealable plastic bags.
Submit spray canisters when possible.
Refer to Hazardous Materials Transportation when submitting pepper-spray canisters.
Pharmaceutical Examinations
Pharmaceutical examinations can identify constituents, active ingredients, quantity, and weight.
Questions concerning pharmaceutical evidence should be directed to 703-632-8441. Follow the evidence submission directions, including Requesting Evidence Examinations and Packaging and Shipping Evidence .
List the names of the pharmaceuticals and information on their use.
If possible, submit pharmaceuticals in original containers.
Polymer Examinations
Polymer evidence typically consists of pieces of plastic or other manufactured materials. The source, use, or manufacturer of polymer evidence usually cannot be identified by compositional 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 polymer 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 left on the car. Collect and package the fragments carefully to keep the edges intact.
Search the accident or crime scene and personal effects of the victim(s) to locate plastic fragments. Submit fragments in leakproof containers such as film canisters or plastic pill bottles. Do not use cotton or paper containers.
Remove damaged suspect motor vehicle parts, and package separately in resealable plastic bags or boxes.
If possible, submit entire items (e.g., clothing) with potential or smeared polymeric transfers. Package separately in paper bags. If the entire item cannot be submitted, cut with a clean, sharp instrument a section where the transfer is suspected. Collect an unstained control sample. Pack to prevent stain removal by abrasive action during shipping. Pack in clean paper. Do not use plastic containers.
Product-Tampering Examinations
Product tampering is when a commercial product is intentionally distorted to harm someone or to extort money or other thing of value. Examples range from drug tampering in medical environments, food adulteration in supermarkets, and the combination of tampering and altering in domestic settings.
The Laboratory will not assess manufacturing quality control or product specifications in commercial products.
Questions concerning product-tampering evidence should be directed to 703-632-8441.
Package paint specimens in leakproof containers such as vials or pillboxes. Do not attach paint particles to adhesive tape. Do not use plastic bags, cotton, or envelopes to package paint specimens.
Pepper-Spray or Pepper-Foam Examinations
Oleoresin capsicum is a resin in various peppers. It may be used in self-defense sprays or foams. Ultraviolet dye (orange) and/or tear gas also may be in the sprays or foams. Items can be analyzed for the presence of oleoresin capsicum, dye, or tear gas.
Questions concerning pepper-spray evidence should be directed to 703-632-8441. Follow the evidence submission directions, including Requesting Evidence Examinations and Packaging and Shipping Evidence .
Submit entire items (e.g., clothing) when possible. Air-dry the evidence, and package separately in paper bags.
Moisten a clean cotton cloth or swab with isopropanol (rubbing alcohol), and wipe over the suspected sprays or foams. Prepare a second moistened cloth or swab as a control. Air-dry the cloths or swabs and pack separately in heat-sealed or resealable plastic bags.
Submit spray canisters when possible.
Refer to Hazardous Materials Transportation when submitting pepper-spray canisters.
Pharmaceutical Examinations
Pharmaceutical examinations can identify constituents, active ingredients, quantity, and weight.
Questions concerning pharmaceutical evidence should be directed to 703-632-8441. Follow the evidence submission directions, including Requesting Evidence Examinations and Packaging and Shipping Evidence .
List the names of the pharmaceuticals and information on their use.
If possible, submit pharmaceuticals in original containers.
Polymer Examinations
Polymer evidence typically consists of pieces of plastic or other manufactured materials. The source, use, or manufacturer of polymer evidence usually cannot be identified by compositional 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 polymer 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 left on the car. Collect and package the fragments carefully to keep the edges intact.
Search the accident or crime scene and personal effects of the victim(s) to locate plastic fragments. Submit fragments in leakproof containers such as film canisters or plastic pill bottles. Do not use cotton or paper containers.
Remove damaged suspect motor vehicle parts, and package separately in resealable plastic bags or boxes.
If possible, submit entire items (e.g., clothing) with potential or smeared polymeric transfers. Package separately in paper bags. If the entire item cannot be submitted, cut with a clean, sharp instrument a section where the transfer is suspected. Collect an unstained control sample. Pack to prevent stain removal by abrasive action during shipping. Pack in clean paper. Do not use plastic containers.
Product-Tampering Examinations
Product tampering is when a commercial product is intentionally distorted to harm someone or to extort money or other thing of value. Examples range from drug tampering in medical environments, food adulteration in supermarkets, and the combination of tampering and altering in domestic settings.
The Laboratory will not assess manufacturing quality control or product specifications in commercial products.
Questions concerning product-tampering evidence should be directed to 703-632-8441.
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