Theories on the blood in the silencer

[Cambridgecutie]

Only if they took an interest in such things, and they weren't educated in science.

In any case, They still wouldn't have known that RB's blood was a match for SC

See my post above.

[Cambridgecutie]

I definitely recall ABO blood group system from O level biology.  Here it is for GCSE:

https://www.youtube.com/watch?v=RY2HP2WWP2A

So I am sure the relatives would have some idea that forensic scientists could differentiate.

[David1819]

He must have thought that the blood would be tested - and just imagine if the blood matched none of the victims and was only a match for him! I think most people who don't know anything about blood grouping (DNA testing wasn't a thing them) would assume that forensic scientist would be able to trace blood back to the person who it came from.

If you read his diary and his draft response to the Jury question. It becomes rather apparent he is not the smartest of people.

If the blood matched none of the victims then there would be no arrest warrant and his blood would never be tested in the first place.

Mind you, it has been alleged by the CT that he refused to give a DNA sample in 2001. I don't know if its true or not. But I do know AE and PB gave DNA samples in 2001.

[BarefootDanC]

I definitely recall ABO blood group system from O level biology.  Here it is for GCSE:

https://www.youtube.com/watch?v=RY2HP2WWP2A

So I am sure the relatives would have some idea that forensic scientists could differentiate.

It's general knowledge that human's have different blood types and so if you need a blood transfusion, depending on what blood group you are, your body will only accept certain types.

[Cambridgecutie]

If you read his diary and his draft response to the Jury question. It becomes rather apparent he is not the smartest of people.

The same can be said for you.

If the blood matched none of the victims then there would be no arrest warrant and his blood would never be tested in the first place.

No idea where your 'thinking' is here. 

Mind you, it has been alleged by the CT that he refused to give a DNA sample in 2001. I don't know if its true or not. But I do know AE and PB gave DNA samples in 2001.

Now you really are showing how idiotic you are. 

There is no such thing as a DNA sample.  I think you might mean a biological sample for DNA testing.

The reason AE and PB provided blood for DNA testing for the 2001/01 CoA hearing is that they are biologically related to June!  RWB is not biologically related so there was no need for him to provide any biological samples.

At PM blood samples were taken from all victims.  These blood samples were later destroyed along with most case related exhibits other than the rifle and silencer.  Hence when DNA testing become available there was no biological sample left to test.  Therefore it was agreed by the defence and prosecution that blood relatives would provide samples and statistical analysis applied. 

In the case of June, PB and AE provided samples.  In the case of SC her biological mother provided a sample.  The CoA doc states: 490. Samples obtained from Sheila Caffell's natural mother and from other sources.