AccessMyLibrary provides FREE access to over 30 million articles from top publications available through your library.
Create a link to this page
Copy and paste this link tag into your Web page or blog:
Chemical examinations of general unknowns.(Evidence Examinations)(Brief Article)
General unknowns include powders, liquids, and stains which are of indeterminate origin or cannot be readily classified. Full identification of an unknown may not be possible; however, general classification of a substance is usually achievable. When comparison samples are available, it may be possible to comment regarding the consistency of the unknown substance with a known comparison sample.
Call the Laboratory at 703-632-8441 prior to submitting general unknowns to ensure that the evidence will be accepted for examination. The communication accompanying the evidence must reference the telephone conversation accepting the evidence.
Questions concerning general unknown examinations should be directed to 703-632-8441. Follow the Evidence ...
- Bank security dyes examinations.(Evidence Examinations)(Brief Article)
- Handbook of Forensic Services January 1, 2003 700+ words
...directions including Requesting Evidence Examinations and Packaging and Shipping Evidence...a heat-sealed or resealable plastic bag. Collect an unstained control...a heat-sealed or resealable plastic bag. Back to the top
- 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 items...dry the swab and pack in a heat-sealed or resealable plastic bag. * Submit suspected sources of lubricants for comparison...
- 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...clean, sharp instrument and transfer it to a resealable plastic bag or leakproof container such as a film canister or plastic...
- Shoeprint and tire tread examinations.(Evidence Examinations)
- Handbook of Forensic Services January 1, 2003 700+ words
...not be used. Mixing Dental Stone in a Bag Store dental stone in resealable plastic bags. An 8- by 12-inch resealable plastic bag can store two pounds of dental stone powder. With premeasured bags, casting impressions at the crime scene involves only...
- 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...
- Toolmark 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. * If possible, submit the toolmarked evidence. * If it is not possible...
Source: HighBeam Research, Chemical examinations of general unknowns.(Evidence...