Originally posted by Victor
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The issue of possible original contamination both during 1961 testing in the lab by Dr Grant, when Hanratty"s stained fly area of trouser was tested by Dr Grant ---prior to testing V.S"s underwear on 28th/29th Dec.1961 respectively ,and when possible contamination both then and afterwards could have taken place-the cloth sample said[by Michael Hanratty] to have been discovered to have been accidently "dropped' during its excise ,on a bench where Hanratty"s trousers had been placed the previous day.
Isnt this all the more reason to be concerned that we actually know nothing that has anything of corroborated detail regarding the actual "history" of this 1961 cloth sample from the crotch area of knickers ?We dont know how big it was,whosoever had access to it during and from December 1961 or whether the DNA body fluids had "mixed"and if they had, whether they could ever have been reliably tested as to what quantity came from which original fluid or whether there had been initial contamination by secondary fluid ie from Hanratty"s green trousers for example .So much is conjecture ---because we are given no precise measurements re the quantity of "separated " seminal fluid /vaginal fluid that comprise the stains nor is the information from 1961 clear about the exact age or condition of the fluids .
Importantly,it is precisely the"mixture interpretation" of samples that has been so severely questioned by Budowle and his team working on research papers for the FBI ,that has not been validated and that has therefore been strongly disputed for its reliability for use in a court of law.
Remember the 2002 appeal ruling "predated" by 4 years the findings of LCN DNA test expert, Budowle"s 2006 discoveries as found in his above research papers and specifically pertaining to the pitfalls of " small mixed sample" LCN DNA testing.
Best
Norma
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