FBI Handbook of Crime Scene Forensics Read Online Free PDF

by the suspect(s) regarding the source of the blood.
Whether animal blood is present.
Whether the stains were laundered or diluted with other body fluids.
Information regarding the health of the victim(s) and suspect(s), including the presence of such infections as AIDS, hepatitis, and tuberculosis.
    Semen and Semen Stains
Absorb suspected liquid semen onto a clean cotton cloth or swab. Air-dry the cloth or swab and pack in clean paper or an envelope with sealed corners. Do not use plastic containers.
Submit small suspected dry semen-stained objects to the Laboratory. Pack to prevent stain removal by abrasive action during shipping. Pack in clean paper. Do not use plastic containers.
When possible, cut a large sample of suspected semen stains from immovable objects with a clean, sharp instrument. Pack to prevent stain removal by abrasive action during shipping. Pack in clean paper. Do not use plastic containers.
Absorb suspected dried semen stains on immovable objects onto a clean cotton cloth or swab moistened with distilled water. Air-dry the swab or cloth and place in clean paper or an envelope with sealed corners. Do not use plastic containers.
Note: It is not necessary to collect reference seminal fluid for comparison. Refer to the Collecting Known Samples section for more information.
    Seminal Evidence from Sexual Assault Victims
Sexual assault victims must be medically examined in a hospital or a physician’s office using a standard sexual assault evidence kit to collect vaginal, oral, and anal evidence.
Refrigerate and submit the evidence to the Laboratory as soon as possible.
    Saliva and Urine, Other Sources of Body-Fluid Evidence
Absorb suspected liquid saliva or urine onto a clean cotton cloth or swab. Air-dry the cloth or swab and pack in clean paper or an envelope with sealed corners. Do not use plastic containers.
Submit small suspected dry saliva- or urinestained objects to the Laboratory. Pack to prevent stain removal by abrasive action during shipping. Pack in clean paper or an envelope with sealed corners. Do not use plastic containers.
When possible, cut a large sample of suspected saliva or urine stains from immovable objects with a clean, sharp instrument. Pack to prevent stain removal by abrasive action during shipping. Pack in clean paper. Do not use plastic containers.
Pick up cigarette butts with gloved hands or clean forceps. Do not submit ashes. Air-dry and place the cigarette butts from the same location (e.g., ashtray) in clean paper or an envelope with sealed corners. Do not submit the ashtray unless a latent print examination is requested. Package the ashtray separately. Do not use plastic containers.
Pick up chewing gum with gloved hands or clean forceps. Air-dry and place in clean paper or an envelope with sealed corners. Do not use plastic containers.
Pick up envelopes and stamps with gloved hands or clean forceps and place in a clean envelope. Do not use plastic containers.
    Hair
Pick up hair carefully with clean forceps to prevent damaging the root tissue.
Air-dry hair mixed with suspected body fluids.
Package each group of hair separately in clean paper or an envelope with sealed corners. Do not use plastic containers.
Refrigerate and submit to the Laboratory as soon as possible.
    Tissue, Bones, and Teeth
    Call the Laboratory at 703-632-7572 prior to submitting suspected tissue, bones, or teeth to ensure that the evidence will be accepted for examination. The communication accompanying the evidence must reference the telephone conversation accepting the evidence.
Pick up suspected tissue, bones, and teeth with gloved hands or clean forceps.
Collect 1-2 cubic inches of red skeletal muscle.
Submit whole bones. Cutting bones increases the possibility of contamination.
Collect teeth in the following order:
Nonrestored molar.
Nonrestored premolar.
Nonrestored canine.
Nonrestored front tooth.
Restored molar.
Restored premolar.
Restored canine.
Restored front tooth.
Place tissue samples in a