Originally posted by Natalie Severn
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As Derrick points out on the main thread, cell source cannot be determined, so how are you accounting for the scientists to be able to distinguish between MG's and the rapist's semen for targetting?
Next the fragment of old cloth was not then stored according to modern requirements but instead was found in a locker with a broken vial and Hanratty"s trousers---which we know had semen on the inside fly---because some of that was removed for testing too in 1961.So after 31 years in substandard conditions of storage-by modern standards- and abundant opportunities of contamination,the fragment is tested yet again , this time to discover the rapists DNA in 1995 and surprise ,surprise, it yielded nothing---but the scant DNA left on the cloth was left another 6 years to further "degrade" and what little was left was put to be tested by Low Copy number DNA testing---notorious for including contaminated DNA in its results---and blow me down Hanratty"s "DNA" pops up,bold as brass [and probably from his stored trousers or the broken vial].
The file containing the fragment from the knickers was discovered in 1991 by Jennifer Wiles. It was still packaged as described except that the cellophane package was no longer intact. Also found in the file were some broken slides and slide holders possibly having contained hairs and fibres collected at the scene of the murder. There were also two polythene bags each containing hairs thought now to have come from Alphon. There was another polythene bag containing a number of bullets and significantly, so Mr Mansfield submits, a polythene bag containing a small rubber bung and fragments of glass including a curved piece suggesting that the polythene bag had at one time contained a glass vial or tube.
From http://www.theforensicinstitute.com/...tement%202.pdf
"DNA is an inherently stable molecule and requires something to destroy or degrade it; examples are action by light, cellular enzymes, or bacteria." and "DNA has been extracted from mummies (albeit with mixed success), and profiles are routinely obtained in Medical Genetics from blood spots on card stored at room temperature that are at least 40 years old"
The link you gave refers to action by an enzyme, now where is this enzyme going to come from?
KR,
Vic.
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