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Toolmark examinations.(Evidence Examinations)
Toolmarks
Tools can bear unique microscopic characteristics due to manufacturing processes and use. These characteristics can be transferred to surfaces that contacted the tools. Evidence toolmarks can be compared to recovered tools. In the absence of a questioned tool, toolmark examinations can determine the type of tool(s) that produced the toolmark and whether the toolmark is of value for comparison. Toolmark examinations also include lock and key examinations.
Fractures
Fracture examinations can be used to associate whether evidence was joined together and subsequently broken apart.
Questions concerning toolmark evidence should be directed to 703-632-8442. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence.
* If possible, submit the toolmarked evidence.
* If it is not possible to submit the toolmarked evidence, make a cast to submit to the Laboratory.
- 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...
- Arson examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...evidence should be directed to 703-632-7641. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Ignitable liquids are volatile and easily lost through evaporation...
- Ink 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. * Pack ink evidence separately from any document or surface with ink marks...
- Soil examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...evidence should be directed to 703-632-7690. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Collect soil samples as soon as possible, because the soil at the crime...
- Tape examinations.(Evidence Examinations)(tape evidence)(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. * Whenever possible, submit tape still adhered to the substrate. This...
- Anthropological examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...evidence should be directed to 703-632-7691. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Clean and air-dry bones, if possible. Pack in paper bags and wrap...
- Feather examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...evidence should be directed to 703-632-7690. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * Submit feathers in heat-sealed or resealable plastic bags or paper...
- Firearms examinations.(Evidence Examinations)
- Handbook of Forensic Services January 1, 2003 700+ words
...evidence should be directed to 703-632-8442. Follow the Evidence Submission directions including Requesting Evidence Examinations and Packaging and Shipping Evidence. * All firearms must be unloaded. * The firearm should be submitted...