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Hairs, Fibers, Crime, and Evidence, Part 1, by Deedrick (Forensic Science Communications, July 2000) |
 | | As hairs undergo a cyclical growth (anagen) and resting phase (telogen), the visible microscopic characteristics are sufficient to determine the phase of growth of the hair. |
 | | Approximately 10 percent of the hairs on a human head (100/1000), therefore, are in the quiescent telogen phase, and a minimal amount of forcesuch as that from combingis required to dislodge the hairs from the dormant follicle. |
 | | Pubic hairs are not subject to as much change as head hairs over time, and because of this, a sample taken a year or more after a crime may still be suitable for meaningful comparison purposes. |
| www.fbi.gov /hq/lab/fsc/backissu/july2000/deedric1.htm (4076 words) |
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