Handbook of Forensic Services (pdf) - FBI
Handbook of Forensic Services (pdf) - FBI
Handbook of Forensic Services (pdf) - FBI
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<strong>Handbook</strong> <strong>of</strong> Forens c Serv ces 2007<br />
can assoc ate v ct ms and suspects w th each<br />
other, w th ev dence tems, or w th a cr me scene.<br />
There are two types <strong>of</strong> DNA used n forens c<br />
analyses. Nuclear DNA (nDNA) s the more<br />
d scr m nat ng <strong>of</strong> the two types and s typ cally<br />
analyzed n ev dence conta n ng blood, semen,<br />
sal va, body t ssue, and ha rs that have t ssue at<br />
the r root ends. The power <strong>of</strong> nDNA test ng done<br />
by the DNA Analys s Un t I (DNAUI) l es n ts<br />
ab l ty to potent ally dent fy an nd v dual as be ng<br />
the source <strong>of</strong> the DNA obta ned from an ev dence<br />
item to a reasonable degree <strong>of</strong> scientific certainty,<br />
as well as the definitive power <strong>of</strong> exclusion.<br />
Add t onally, where appropr ate, the DNA-typ ng<br />
results from ev dence tems ( nclud ng tems<br />
related to m ss ng persons) exam ned n the<br />
DNAUI may be uploaded nto the Comb ned DNA<br />
Index System (CODIS) database.<br />
M tochondr al DNA (mtDNA) s typ cally analyzed<br />
n ev dence conta n ng naturally shed ha rs, ha r<br />
fragments, bones, and teeth. Typ cally, these<br />
tems conta n low concentrat ons <strong>of</strong> degraded<br />
DNA, mak ng them unsu table for nDNA<br />
exam nat ons. The h gh sens t v ty <strong>of</strong> mtDNA<br />
analys s allows sc ent sts to obta n nformat on<br />
from old tems <strong>of</strong> ev dence assoc ated w th cold<br />
cases, samples from mass d sasters, and small<br />
p eces <strong>of</strong> ev dence conta n ng l ttle b olog cal<br />
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