Originally posted by caz
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I could be wrong, but what I think Derrick means is that in 1961, two semen stains were identified, one of them being from a man with blood group O. The reason they knew this was because he was what they call a 'secretor' - that is, his blood group was identifiable in his semen.
The blood group of the other semen stain was not identified - although I am unsure how they distinguished it from the one above - unless they were just using VS's evidence as a guideline.
In 2002, the two semen deposits were identified as two different DNA sequences. Did they, at that point, positively identify one as being from an AB secretor - or did they just refer back to the evidence they were using in 1961 and 'attribute' the second semen deposit to MG - and that is why they used the word 'assumed'?
Concerning the hanky, some people believe the person who knew JH had been at the Vienna Hotel actually supplied the gun and had access to JH's dirty washing. As an aside, during an earlier period of incarceration, Hanratty told a fellow lag that he always carried a clean, spare hanky to use at robberies. He never used gloves. I think he preferred a clean hanky for this purpose because it was better for wiping prints from surfaces and articles.
Julie
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