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Titolo:
An evaluation of the relevance of routine DNA typing of fingernail clippings for forensic casework
Autore:
Oz, C; Zamir, A;
Indirizzi:
Israel Police Natl Headquarters, Div Identificat & Forens Sci, Forens BiolLab, Jerusalem, Israel Israel Police Natl Headquarters Jerusalem Israel Lab, Jerusalem, Israel
Titolo Testata:
JOURNAL OF FORENSIC SCIENCES
fascicolo: 1, volume: 45, anno: 2000,
pagine: 158 - 160
SICI:
0022-1198(200001)45:1<158:AEOTRO>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
PCR; ALLELES;
Keywords:
forensic science; fingernail clippings; DNA typing; polymerase chain reaction; contamination; D1S80; CSF1PO; THO1; TPOX; short tandem repeats;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
11
Recensione:
Indirizzi per estratti:
Indirizzo: Oz, C Israel Police Natl Headquarters, Div Identificat & Forens Sci, Forens BiolLab, Jerusalem, Israel Israel Police Natl Headquarters Jerusalem Israel erusalem, Israel
Citazione:
C. Oz e A. Zamir, "An evaluation of the relevance of routine DNA typing of fingernail clippings for forensic casework", J FOREN SCI, 45(1), 2000, pp. 158-160

Abstract

DNA extracted from fingernail clippings of victims in forensic cases is a possible source of DNA from the perpetrator in cases where victims struggled or defended themselves. The source of this DNA on a victim's fingernails could possibly originate from contact with the suspect's blood, saliva, semen or scratched skin. In this technical note we evaluate the relevance of routine DNA typing of fingernail clippings in the forensic biology laboratory when, in real casework, normally only small quantities of nail material is sent. This was carried out by extracting DNA from fingernail clippings from a number of volunteers, before and after aggressively scratching other volunteers. No blood was drawn from the scratching, but skin flakes were observed under the nails before cutting and subsequent DNA. typing. The DNA extracted was then typed using the STR systems: HUMTHO1, HUMTPOX and HUMCSF1PO (CTT tripler) and the system of D1S80. These profiles were compared with profiles achieved by similar typing of buccal swabs as a reference from each volunteer. In this study, the profile detected from each volunteer's clippings was the same before and after scratching, and matched the profile of the corresponding volunteer as defined by typing each volunteer's referencebuccal swab. Fingernail clippings that are sent to our lab in actual casework are usually so small that additional treatment by swabbing or removing debris from below the clipping is not possible. For this reason, in this simulation the entire clippings were used for DNA extraction, to maximize thepossibility of finding an additional profile. In conclusion, the findings from this study show that although the profiles obtained when typing fingernail clippings are those of the donors themselves, we suggest that typing of fingernail clippings should be carried out in forensic cases only when relevant. We would suggest that fingernail clippings not be routinely sent to the biology laboratory as items of evidence to be tested.

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Documento generato il 23/11/20 alle ore 21:40:05