Hair Collection Methods - Professional organizations have many techniques for specimen collection. Taping, shaking, scraping and picking are common methods that work best when gathering samples from fabrics such as bedding and clothes. - Specially equipped vacuums rely on filtered containment units to collect hair from carpets and upholstered surfaces. - Hairs are small and easily lost or misplaced. This often leads to cross contamination between evidence specimens that can be reduced by special lighting and magnification tools that increase accuracy of hair recognition and separation.
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| Hair being compared to other samples |
Fiber Collection Methods - Fibers are usually collected using adhesive tape. The strips of tape are then examined for fibers that match a normal part of the crime scene. The stickiness of the tape varies based on the fiber needing to be retrieved. Sometimes, if the tape is too strong, target fibers are buried in excess fibers that not important to the crime scene. If tape isn’t sticky enough, many potentially useful fibers may not be collecting as evidence.
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| Man collecting fibers from a rug using adhesive tape (he really should be wearing gloves) |
Your descriptions are excellent- very clear and understandable. You also have nice images spread throughout
ReplyDeleteDo they not ever just use tweezers and their eyes to locate fibers?
ReplyDeleteexcellent organization and planning in this post, likewise, the images compliment the text nicely
ReplyDeleteThis was a shorter article but it was as much interesting as the other ones. The best and most interesting thing about it is that fibers are usually collected using adhesive tape. I didn't know that and the fact that the strips of tape are then examined for fibers that match a normal part of the crime scene surprised me a lot. I love this articles. This is Dario Pellon and this post is for Forensics 8th Period
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