Read FBI Handbook of Crime Scene Forensics for Free Online Page B

Imaging
    Visual information specialists provide composite drawings, two- and three-dimensional facial reconstructions from skeletal remains, facial age progressions, postmortem reconstructions, and digital photographic manipulations and retouches. Interviews required to prepare composite drawings may be conducted either by having a visual information specialist travel to the field or by using video teleconferencing.
    For facial comparisons between known and questioned subjects, see Image Analysis Examinations .
    Questions concerning forensic facial imaging should be directed to 703-632-8194.
    Glass Examinations
    Glass comparison examinations can determine whether particles of glass originated from a broken source of glass. Glass fracture examinations can determine the direction and type of the breaking force and the sequencing of shots.
    Questions concerning glass evidence should be directed to 703-632-8449. Follow the evidence submission directions, including Requesting Evidence Examinations and Packaging and Shipping Evidence .
    Comparison
Submit samples of glass from each broken window or source in leakproof containers such as film canisters or plastic pill bottles. Do not use paper or glass containers.
Submit samples of laminated glass (e.g., windshield) from each side of the glass. Label the samples “INSIDE” and “OUTSIDE” and package separately in leakproof containers such as film canisters or plastic pill bottles. Do not use paper or glass containers.
Submit the air-dried clothing of the victim(s) and suspect(s). Package each item separately in a paper bag.
Search for particles in the hair, skin, and wounds of the victim(s) and suspect(s). Submit particles in leakproof containers such as film canisters or plastic pill bottles. Do not use paper or glass containers.
Search for particles in vehicles by vacuuming each section of the vehicle separately. Do not use tape for recovering glass particles. Submit vacuum sweepings in leakproof containers. Do not use paper or glass containers.
Ship known and questioned debris separately to avoid contamination.
Do not process evidence for latent prints.
    Fracture
Label the sides of the glass in the frame (“INSIDE” and “OUTSIDE”). Label the glass where it was removed in the frame (“TOP,” “BOTTOM,” “LEFT,” and “RIGHT”).
Submit all glass pieces so that the pieces can be fit together to identify the radial cracks near and at the point(s) of impact and to increase the probability of matching edges. Pack all glass separately and securely to avoid shifting and breaking during shipping.
Submit the entire piece of laminated glass, if possible. Secure the glass between sheets of plywood or sturdy cardboard. Do not place any objects into the impact area.
    Do not process evidence for latent prints.
    Hair and Fiber Examinations
    Hair
    Hair examinations can determine whether hairs are animal or human. Race, body area, method of removal, damage, and alteration (e.g., bleaching or dyeing) can be determined from human-hair analysis. Examinations can associate a hair to a person on the basis of microscopic characteristics in the hair but cannot provide absolute personal identification. Hairs that are associated will be submitted for mitochondrial DNA analysis.
    Fibers
    Fiber examinations can identify the type of fiber, such as animal (wool), vegetable (cotton), mineral (glass), and synthetic (manufactured). Questioned fibers can be compared with fibers from the clothing, carpeting, and other textiles of victim(s) and suspect(s). A questioned piece of fabric can be matched physically to known fabric. Fabric composition, construction, and color can be compared, and impressions on and from fabric can be examined. Label searches can determine clothing manufacturer information.
    Questions concerning hair and fiber evidence should be directed to 703-632-8449. Follow the evidence submission directions, including Requesting Evidence Examinations and Packaging and Shipping